Outbreak Watch Briefing

Behold a Pale Horse

This page tracks credible reports of Ebola, unusual disease clusters, strange outbreaks, and emerging public-health threats. Each briefing is organized newest-first, with the latest edition at the top. Use the case counts, trend notes, maps, and source links as a situational awareness tool, not as medical advice. For health decisions, follow local public-health authorities, medical professionals, CDC, WHO, and ministry-of-health guidance.

Start with the Situation Board
Find the most urgent developments first.

Scan the Case & Trend Cards
Review numbers, locations, and movement.

Use Linked Sources
Verify claims and read original reports.

Watch for Changes
Track geography, case growth, transmission, and official risk level.

This archive is for awareness and editorial monitoring only. It is not medical advice, diagnosis, treatment guidance, or emergency instruction.

Daily Outbreak Watch

Behold a Pale Horse: June 2, 2026 Briefing

Risk summary: Ebola Bundibugyo remains the lead global outbreak concern. The DRC count has been revised to 321 confirmed cases, 48 deaths, 116 suspected cases, and six recoveries after hundreds of earlier suspected cases were ruled out. Uganda has now confirmed six additional cases, raising its national total to 15 confirmed infections. The headline today is not easing risk. It is sharper data, wider verified spread, and renewed travel/logistics pressure as Bunia airport reopens under screening controls.

Lead Threat

Ebola Bundibugyo

DRC, Uganda, PHEIC active

Latest Count Shift

321 DRC Cases

Confirmed DRC cases rose while suspected totals dropped after investigation.

Regional Flashpoint

Uganda 15

Uganda confirmed six new cases among contacts of known cases.

Situation Board

The outbreak picture is becoming cleaner and more serious at the same time: fewer suspected cases on paper, more confirmed cases in reality, and Uganda now showing fresh contact-linked spread.

Edition date June 2, 2026. Latest source timestamp used: Reuters report on Uganda cases published June 2 at 11:30 UTC, plus Reuters/WHO DRC case revision and CDC/ECDC situation pages.
Lead outbreak status Ebola disease caused by Bundibugyo virus remains active in DRC and Uganda and is under international public-health emergency response.
Latest DRC count WHO-linked reporting lists 321 confirmed cases, 48 deaths, 116 suspected cases, and six recoveries in DRC after hundreds of suspected cases were ruled out or reclassified.
Latest Uganda count Uganda’s health ministry confirmed six new cases among contacts of known cases, bringing the national total to 15 confirmed infections, with 12 hospitalized, two discharged, and one death.
Affected areas Reuters reports Ebola has reached 15 of 36 health zones in Ituri, with additional cases reported in North Kivu, South Kivu, and neighboring Uganda. ECDC’s latest public page lists Ituri as the most affected province.
Travel/logistics update DRC has reopened Bunia airport with temperature screening, mandatory handwashing, and fever-based boarding restrictions. The reopening reverses a passenger-flight suspension that residents said had restricted access to critical supplies.
Operational pressure Testing has been a central challenge because common Ebola tests initially did not detect the Bundibugyo strain well, while insecurity, movement corridors, mining-related travel, displacement, and trust gaps continue to complicate response work.

Lead Outbreak

Ebola Bundibugyo: DRC and Uganda

The lead story today is a data-cleanup event with teeth. The suspected DRC case count has dropped sharply to 116, but not because the outbreak has evaporated. WHO says hundreds of suspected cases were ruled out after investigation, while the confirmed DRC count now stands at 321 with 48 deaths. That makes the picture clearer, not safer. Cleaner data helps responders aim the response, but the confirmed case load is now large enough to keep the outbreak firmly in high-concern territory.

Uganda’s update is the second pressure point. Six new cases were confirmed among contacts of previously known cases, lifting Uganda’s total to 15. Contact-linked cases can be a sign that surveillance is catching known chains, but they also prove the chains exist. Uganda now has 12 people admitted, two discharged, and one death. That moves Uganda from a linked-border concern into a more active watch position.

The Bunia airport reopening is the third major note. It may restore essential movement for supplies and response teams, but it also requires strict discipline. Temperature screening and handwashing controls are helpful, yet Ebola control depends on rapid identification, isolation, contact tracing, safe care, safe burial, and community trust. The real test is whether mobility resumes without giving the virus more roads.

Case & Trend Cards

DRC Confirmed Ebola

321

WHO-linked reporting lists 321 confirmed DRC cases after updated investigation and laboratory confirmation.

DRC Confirmed Deaths

48

Confirmed deaths now stand at 48 in DRC, with six reported recoveries.

DRC Suspected Cases

116

Suspected cases dropped after hundreds were cleared, reclassified, or found to be other illnesses.

Uganda Confirmed Cases

15

Uganda confirmed six new cases among contacts, with 12 hospitalized, two discharged, and one death.

Ituri Health Zones

15/36

Reuters reports Ebola has reached 15 of 36 health zones in Ituri province.

U.S. Confirmed Cases

0

CDC says no U.S. cases have been confirmed from this outbreak and the overall U.S. public risk remains low.

Map & Image Area

Current visual references

CDC Ebola affected-area map: CDC’s situation page includes the current outbreak map and U.S. risk summary for DRC and Uganda.

Open CDC Map Source

ECDC affected-area visual: ECDC’s outbreak page includes affected-area imagery and regional case distribution notes for DRC and Uganda.

Open ECDC Visuals

Image note: Link directly to official maps and public-health pages unless the publishing platform confirms image licensing or embed permission. Avoid hotlinking agency or wire images by default.

Secondary Watchlist

Brazil investigates suspected Ebola cases in travelers

ProMED’s public feed flags suspected Ebola cases under investigation in São Paulo and Rio de Janeiro involving travelers with recent links to DRC and Uganda. These are not confirmed Ebola cases, but they belong on the board because suspected exported cases test whether airport screening, clinical suspicion, isolation protocols, and public messaging are working.

Open ProMED outbreak feed

Andes hantavirus cruise-ship cluster remains under monitoring

ECDC’s weekly threats reporting continues to include the South Atlantic Andes hantavirus outbreak linked to the M/V Hondius cruise ship. ProMED also noted a June 1 update indicating the ship had been disinfected. This remains a secondary watch item because Andes virus can cause severe hantavirus pulmonary syndrome and is the rare hantavirus with documented person-to-person transmission under some conditions.

Read ECDC Andes hantavirus update

ECDC weekly threats: Ebola, hantavirus, cholera, West Nile virus

ECDC’s latest Communicable Disease Threats Report covers the period of May 23 to May 29 and includes updates on Ebola, hantavirus, cholera, West Nile virus, and respiratory virus epidemiology in the EU/EEA. The report is useful because it places the Ebola outbreak inside the broader global disease dashboard rather than treating it as a single isolated emergency.

Read ECDC weekly threats report

U.S. measles outbreaks remain unusually active

CDC’s latest measles page reports 1,983 confirmed U.S. cases in 2026, with 30 new outbreaks and 93% of confirmed cases associated with outbreaks. This is not a strange pathogen, but it is a major public-health warning light because measles exposes immunity gaps quickly and can spread before slower systems catch up.

Open CDC measles outbreak data

CDC travel notices remain active for multiple disease threats

CDC’s travel-health notice board remains the fastest practical screen for outbreak-related traveler risk. Current concerns include Ebola-related notices, mosquito-borne disease alerts, meningococcal disease, yellow fever, polio, and other region-specific health threats. For travelers, this remains the daily “check before you go” board.

Open CDC travel health notices

Source Notes

  • Most current DRC count used here: Reuters reporting from June 2 citing WHO and DRC authorities: 321 confirmed cases, 48 deaths, 116 suspected cases, and six recoveries.
  • Most current Uganda count used here: Reuters reporting from June 2 citing Uganda’s health ministry: 15 confirmed cases, 12 hospitalized, two discharged, and one death.
  • Count caution: the sharp drop in suspected DRC cases reflects investigation, ruled-out cases, and case reclassification. It should not be read as a simple improvement in outbreak control.
  • Testing caution: Bundibugyo detection has been difficult because common Ebola tests initially did not detect the strain well, and testing capacity has been limited.
  • Operational concern: the reopening of Bunia airport may improve access and supply movement, but it also requires strong screening, rapid case identification, and disciplined follow-up.
  • Travel concern: CDC says no outbreak-linked Ebola cases have been confirmed in the United States and overall risk to the U.S. public remains low, but traveler screening and clinical awareness remain important.

Linked References

  1. Reuters: WHO says suspected Ebola cases drop to 116 after hundreds ruled out
  2. Reuters: Uganda health ministry confirms six new Ebola cases
  3. Reuters: Congo reopens Bunia airport at center of Ebola outbreak
  4. ECDC: Ebola disease outbreak in DRC and Uganda
  5. CDC: Ebola Outbreak Current Situation
  6. WHO: Ebola outbreak in DRC 2026
  7. WHO AFRO: Ongoing Ebola Bundibugyo outbreak in DRC
  8. ECDC: Communicable Disease Threats Report, Week 22
  9. CDC: U.S. Measles Cases and Outbreaks
  10. ProMED: Public emerging-disease alert feed

Daily Outbreak Watch

Behold a Pale Horse: June 1, 2026 Briefing

Risk summary: Ebola Bundibugyo remains the lead global outbreak concern. Confirmed DRC cases are now reported at 282 with 42 deaths, while Uganda remains at nine confirmed cases and one death. The outbreak is no longer just a virology story. It is now a logistics, travel, funding, vaccine-development, community-trust, and cross-border containment story.

Lead Threat

Ebola Bundibugyo

DRC, Uganda, PHEIC active

Latest Count Shift

282 Cases

DRC confirmed cases rose sharply after new positive test results.

Major Development

Vaccine Race

CEPI, Moderna, Oxford, IAVI, and Gavi are now moving on countermeasures.

Situation Board

Ebola has moved into a higher-stakes phase: confirmed cases are climbing, survivors are emerging, airlines are reacting, and vaccine money is finally entering the battlefield.

Edition date June 1, 2026. Latest reporting used: AP and Reuters updates published June 1, plus CDC, WHO, and ECDC outbreak resources.
Lead outbreak status Ebola disease caused by Bundibugyo virus remains active in DRC and Uganda and has been declared a Public Health Emergency of International Concern.
Latest DRC count AP and Reuters report DRC confirmed cases have reached 282, with 42 confirmed deaths.
Latest Uganda count Uganda remains listed at nine confirmed cases and one death, with cases linked to the DRC outbreak.
Treatment milestone Five recoveries have been reported, including healthcare workers, underlining the importance of early treatment and supportive care.
Travel disruption KLM cancelled Uganda flights because travel restrictions affecting Entebbe made operations impractical for crews and routing.
Vaccine development CEPI announced support for Moderna, Oxford/Serum Institute, and IAVI vaccine efforts targeting Bundibugyo virus disease.

Lead Outbreak

Ebola Bundibugyo: DRC and Uganda

The lead outbreak remains Ebola disease caused by Bundibugyo virus in eastern DRC, with linked activity in Uganda. The latest confirmed count now sits at 282 DRC cases and 42 deaths, a major jump from the prior confirmed tally. That does not automatically mean transmission suddenly exploded overnight. It likely reflects a mix of new infections, testing backlog movement, and improved laboratory confirmation. Still, the practical result is the same: the outbreak footprint is larger and harder to dismiss.

The most important human development is the recovery milestone. Five people, including healthcare workers, have reportedly recovered. In a high-fear outbreak, survivor stories matter because they can reduce fatalism and encourage earlier care-seeking. That said, early care only helps if people trust responders enough to come forward, and WHO continues pressing for community cooperation.

The response environment remains fragile. Conflict in eastern DRC, distrust of medical teams, burial-practice disputes, limited contact tracing, travel restrictions, and funding pressure are all now part of the outbreak machine. Meanwhile, vaccine development has become a central story because Bundibugyo does not have the same licensed vaccine coverage as Zaire Ebola. The cavalry is moving, but it is not at the gate yet.

Case & Trend Cards

DRC Confirmed Ebola

282

AP and Reuters report confirmed DRC cases reached 282 as of June 1.

DRC Confirmed Deaths

42

Confirmed deaths are now reported at 42, while suspected totals remain under review.

Uganda Confirmed Cases

9

Uganda remains linked to the DRC outbreak, with one confirmed death reported.

Reported Recoveries

5

Five recoveries, including healthcare workers, give responders a needed trust-building proof point.

CEPI Moderna Support

$50M

CEPI pledged up to $50 million for Moderna’s investigational Bundibugyo vaccine work.

Andes Cruise Cluster

13

ECDC continues tracking the MV Hondius Andes hantavirus cluster as a secondary watch item.

Map & Image Area

Current visual references

CDC Ebola affected-area map: CDC’s situation page includes affected provinces in northeastern DRC near Uganda and South Sudan, with related Uganda activity.

Open CDC Map Source

ECDC Ebola affected-area image: ECDC’s outbreak page provides regional outbreak visuals and European public-health risk posture.

Open ECDC Visuals

Image note: For the stacked archive, link to official maps and outbreak pages by default. Do not hotlink field photography or agency images unless licensing and embed permissions are confirmed.

Secondary Watchlist

KLM cancels Uganda flights

Reuters reports KLM cancelled flights to and from Entebbe because Ebola-linked travel restrictions affecting Uganda created operational problems for crews and routing. This is a key escalation marker because travel disruption often arrives before broad public understanding catches up.

Read Reuters KLM report

Bundibugyo vaccine race accelerates

Moderna and CEPI announced a partnership to develop a Bundibugyo vaccine candidate, while CEPI also committed funds to Oxford/Serum Institute and IAVI programs. Gavi also announced support for outbreak response and vaccine access. This is encouraging, but none of it changes the immediate field reality: containment still depends on tracing, isolation, PPE, safe care, burial practices, and trust.

Read Reuters vaccine-development report

Andes hantavirus cruise-ship cluster

ECDC continues monitoring the Andes hantavirus outbreak linked to the MV Hondius. The cluster remains small, but it stays on the board because Andes virus is one of the rare hantaviruses with documented limited person-to-person transmission under certain conditions.

Read ECDC Andes hantavirus update

CDC travel-health board

CDC’s travel notices remain the cleanest daily screen for outbreak-related travel risk. Current watch items include Ebola-related notices along with other disease alerts such as chikungunya, yellow fever, polio, meningococcal disease, and other regional threats.

Open CDC travel health notices

ProMED unusual outbreak notes

ProMED remains useful for smoke-trail surveillance across unusual clusters, animal spillover alerts, cholera, measles, meningitis, avian influenza, rabies exposures, leptospirosis, and Ebola-related field updates. Not every item is a global threat, but the feed is valuable for catching weak early indicators.

Open ProMED outbreak feed

Source Notes

  • Most current Ebola count used here: AP and Reuters June 1 reporting listing DRC at 282 confirmed cases and 42 confirmed deaths.
  • Count caution: WHO’s most recent formal Disease Outbreak News page still lists earlier figures from May 27. Daily news wires are carrying newer ministry-linked figures.
  • Interpretation caution: rapid case-count changes can reflect laboratory backlog movement, surveillance expansion, or data reconciliation as well as fresh transmission.
  • Operational concern: contact tracing, conflict-zone access, public trust, safe burial practices, and treatment-center security remain major containment risks.
  • Travel concern: KLM’s Uganda cancellations show that travel restrictions are now creating secondary disruption beyond the immediate outbreak zone.

Linked References

  1. AP: Confirmed Ebola cases in Congo reach 282 as survivors describe recoveries
  2. Reuters: Ebola recoveries bring signs of hope in DRC
  3. Reuters: KLM cancels Uganda flights due to Ebola restrictions
  4. Reuters: Moderna and CEPI partner on Bundibugyo Ebola vaccine
  5. WHO: Disease Outbreak News, Ebola caused by Bundibugyo virus
  6. CDC: Ebola Outbreak Current Situation
  7. ECDC: Ebola disease outbreak in DRC and Uganda
  8. The Guardian: WHO calls for community cooperation to contain DRC Ebola outbreak
  9. ECDC: Andes hantavirus outbreak monitoring page
  10. ProMED: Public emerging-disease alert feed

Daily Outbreak Watch

Behold a Pale Horse: May 29, 2026 Briefing

Risk summary: Ebola Bundibugyo remains the lead public-health concern, with new European reporting showing revised DRC figures of 125 confirmed cases, 17 confirmed deaths, 906 suspected cases, and 223 suspected deaths across Ituri, North Kivu, and South Kivu. Uganda is now listed by ECDC at nine confirmed cases and one death. The headline shift is not comfort, but clarification: suspected counts were revised after non-cases were removed or reclassified, while confirmed cases rose. Funding pressure, border measures, court action in Kenya, and conflict-zone response limits are now part of the outbreak story.

Lead Threat

Ebola Bundibugyo

DRC, Uganda, PHEIC active

Latest Count Shift

Data Revision

Suspected totals dropped after non-cases were removed and some cases were confirmed.

Secondary Cluster

Andes Virus

Cruise-linked hantavirus cluster remains under monitoring.

Situation Board

Ebola numbers are being cleaned up, but the operational picture remains hot: spread across three DRC provinces, Uganda linkage, strained funding, and regional containment politics.

Edition date May 29, 2026. Latest source update used: ECDC Ebola page updated May 29 at 13:30.
Lead outbreak status Ebola disease caused by Bundibugyo virus remains active in DRC and Uganda and has been declared a Public Health Emergency of International Concern.
Latest DRC count ECDC reports that DRC’s Ministry of Health published updated figures on May 28: 125 confirmed cases, 17 confirmed deaths, 906 suspected cases, and 223 suspected deaths.
Latest Uganda count ECDC lists nine confirmed cases in Uganda, including one death. At least three Uganda cases are linked to travel from DRC.
Affected areas DRC activity is reported across Ituri, North Kivu, and South Kivu. CDC also notes five DRC-linked cases reported in Uganda’s capital, Kampala.
Operational pressure Reuters reports Africa CDC says Ebola response pledges dropped from roughly $500 million to about $290 million. That funding squeeze lands directly on testing, tracing, isolation, PPE, safe burial, and community engagement.

Lead Outbreak

Ebola Bundibugyo: DRC and Uganda

The lead outbreak remains Ebola disease caused by Bundibugyo virus, now tracked across three eastern DRC provinces with linked activity in Uganda. The most important development today is the case-count adjustment: suspected cases and suspected deaths fell after DRC authorities removed non-cases and reclassified some records, while confirmed DRC cases rose to 125. That is better data hygiene, not a clean retreat of the outbreak.

The response environment is still ugly. Ituri, North Kivu, and South Kivu sit inside a region already burdened by armed conflict, displacement, strained health facilities, distrust, and difficult movement corridors. WHO leadership has now gone into DRC publicly saying the outbreak can be stopped, while also emphasizing the need for field access, response funding, and cooperation.

Regional politics are also sharpening. Uganda has used border restrictions, the U.S. has pursued third-country quarantine planning for exposed Americans, and a Kenyan court has temporarily suspended a proposed Ebola quarantine facility plan after public backlash and legal challenge. The public-health lesson is blunt: containment is no longer only about virology. It is logistics, trust, funding, law, borders, and whether response teams can reach people fast enough.

Case & Trend Cards

DRC Confirmed Ebola

125

ECDC cites DRC Ministry of Health figures published May 28 showing confirmed cases up to 125.

DRC Suspected Cases

906

Suspected totals decreased after data revision, removal of non-cases, and reclassification of some cases as confirmed.

DRC Confirmed Deaths

17

Confirmed deaths remain severe, while suspected deaths are now listed at 223 after revision.

Uganda Confirmed Cases

9

ECDC lists nine confirmed Uganda cases, including one death, with at least three linked to DRC travel.

Funding Pledges

$290M

Reuters reports Africa CDC says pledges fell from about $500 million to roughly $290 million.

Andes Cruise Cluster

13

ECDC lists 13 total Andes hantavirus cases linked to MV Hondius: 11 confirmed, two probable, and three deaths.

Map & Image Area

Current visual references

CDC Ebola affected-area map: CDC’s current situation page includes a map showing affected provinces in northeastern DRC near Uganda and South Sudan, with linked Uganda activity.

Open CDC Map Source

ECDC Ebola affected-area image: ECDC’s outbreak page includes an affected-area graphic and latest outbreak resources for DRC and Uganda.

Open ECDC Visuals

Image note: For this stacked archive format, link directly to official maps and outbreak pages unless the publishing platform confirms image licensing or embed permission. Avoid hotlinking source images by default.

Secondary Watchlist

Andes hantavirus cruise-ship cluster

ECDC’s May 26 update lists 13 total cases tied to MV Hondius, including 11 confirmed cases, two probable cases, and three deaths. CDC says the outbreak involves Andes virus, a hantavirus that can cause hantavirus pulmonary syndrome, and CDC’s current page states the risk of a pandemic from this outbreak and the overall risk to the American public and travelers remains extremely low.

Read ECDC Andes hantavirus update

CDC travel notices: Ebola, chikungunya, meningococcal disease, yellow fever, and polio

CDC’s travel notice board currently lists DRC Ebola at Level 3, Uganda Ebola at Level 2, and active notices for chikungunya in Mauritius, meningococcal disease in DRC, yellow fever in Venezuela, chikungunya in Mayotte, global polio destinations, chikungunya in Suriname, and chikungunya in Bolivia. This remains the fastest practical travel-risk screen.

Open CDC travel health notices

ProMED unusual outbreak notes

ProMED’s public feed is flagging several watch items from May 27 to May 28, including measles in Syria, viral meningitis in India, rabies exposure in Bolivia and DRC, leptospirosis in Argentina, cholera in Sudan, avian influenza in Cambodia and Japan, and an Ebola update for DRC. These are not all global threats, but they are useful early-warning smoke trails.

Open ProMED outbreak feed

Kenya quarantine-facility dispute

AP reports a Kenyan court suspended a U.S.-backed plan for an Ebola quarantine facility for exposed Americans after backlash from legal groups, activists, and medical workers. This belongs on the watchlist because outbreak response now depends not only on disease control, but on whether host countries, courts, clinicians, and communities accept containment infrastructure.

Read AP report on Kenya court action

ECDC Ebola risk posture for Europe

ECDC says information remains limited, but currently assesses the likelihood of infection for people living in the EU/EEA as very low. The agency is still increasing activities and monitoring updates as the outbreak intensifies in DRC and Uganda.

Read ECDC Ebola outbreak page

Source Notes

  • Most current Ebola count used here: ECDC’s May 29 outbreak page, citing DRC Ministry of Health figures published May 28 and current Uganda reporting.
  • Count caution: CDC’s May 28 page still lists 1,077 suspected DRC cases and 121 confirmed DRC cases based on May 27 ministry reporting. ECDC’s May 29 page reflects a later DRC data revision.
  • Interpretation caution: a lower suspected count does not automatically mean outbreak improvement. It may mean non-cases were removed, case definitions were applied, and some suspected cases became confirmed.
  • Operational concern: funding reductions, conflict, displacement, public distrust, and border politics can weaken the practical response even when surveillance improves.
  • Travel concern: CDC continues to list DRC Ebola at Level 3 and Uganda Ebola at Level 2, with enhanced U.S. screening and public-health measures active for affected arrivals.

Linked References

  1. ECDC: Ebola disease outbreak in DRC and Uganda, updated May 29, 2026
  2. CDC: Ebola Outbreak Current Situation, updated May 28, 2026
  3. WHO AFRO: Ongoing Ebola Bundibugyo outbreak in DRC
  4. Reuters: WHO reports revised suspected Ebola case and death figures
  5. Reuters: Africa CDC says Ebola funding pledges nearly halved
  6. AP: Kenya court suspends U.S. Ebola quarantine facility plan
  7. ECDC: Andes hantavirus outbreak on cruise ship, updated May 26, 2026
  8. CDC: Andes Virus Outbreak on a Cruise Ship, current situation
  9. CDC: Travel Health Notices
  10. ProMED: Public emerging-disease alert feed

Daily Outbreak Watch

Behold a Pale Horse: May 28, 2026 Briefing

Risk summary: Ebola Bundibugyo remains the lead public-health concern. CDC’s May 27 update reports 1,077 suspected cases, 121 confirmed cases, 246 suspected deaths, and 17 confirmed deaths in DRC, plus seven confirmed cases and one confirmed death in Uganda. The newest pressure points are confirmed spread into Sud-Kivu Province, tighter travel screening, Uganda’s temporary DRC border closure, and conflict conditions that are slowing isolation, contact tracing, safe burial, laboratory confirmation, and community response.

Lead Threat

Ebola Bundibugyo

DRC, Uganda, PHEIC active

Key Escalation

Sud-Kivu Spread

CDC now lists confirmed DRC activity in Ituri, Nord-Kivu, and Sud-Kivu.

Global Posture

Low, But Active

CDC says U.S. public risk remains low, with enhanced screening active.

Situation Board

Ebola containment is colliding with conflict, displacement, travel controls, and widening geographic spread.

Edition timestamp May 28, 2026 morning scan. Sources reviewed include CDC’s May 27 Ebola situation summary, WHO updates, Reuters May 28 reporting, ECDC’s Week 21 threat report, and current CDC travel notices.
WHO status The Ebola Bundibugyo outbreak in DRC and Uganda remains a Public Health Emergency of International Concern.
Current CDC-reported count DRC: 1,077 suspected cases, 121 confirmed cases, 246 suspected deaths, and 17 confirmed deaths. Uganda: seven confirmed cases and one confirmed death.
Affected areas DRC activity is confirmed in Ituri, Nord-Kivu, and Sud-Kivu provinces. Uganda has reported linked cases, including cases tied to Kampala.
Travel posture CDC says screening, traveler monitoring, entry restrictions, and rerouting are active for affected arrivals. News reports also indicate Uganda has temporarily closed its DRC border with exceptions for essential movement.
Operational concern Conflict, clinic attacks, community distrust, limited isolation capacity, weak contact follow-up, supply shortages, and displacement are making containment harder.

Lead Outbreak

Ebola Bundibugyo: Democratic Republic of the Congo and Uganda

Ebola Bundibugyo is now a regional containment problem running through conflict zones, high-mobility border corridors, overcrowded displacement areas, and under-equipped health facilities. CDC’s latest situation summary lists 121 confirmed cases and 17 confirmed deaths in DRC, with confirmed spread into Sud-Kivu Province in addition to Ituri and Nord-Kivu. Uganda has seven confirmed cases and one confirmed death, with five cases clearly linked to the first two confirmed cases.

The most serious marker today is the widening gap between what containment requires and what field responders can reliably do. WHO and Reuters reporting point to the same pressure pattern: the response needs rapid testing, isolation, PPE, contact tracing, safe burials, and trust-building, while violence, displacement, misinformation, and attacks on health facilities are slowing the work.

Reuters also reports that WHO is scaling up diagnostic capacity with DRC’s national medical research organization to strengthen the laboratory network, deliver real-time data, and identify confirmed cases faster. That matters because suspected counts are high, confirmed counts are moving, and speed is the difference between a contained outbreak and a widening firebreak failure.

Case & Trend Cards

DRC Confirmed Ebola

121

CDC reports 121 confirmed cases in DRC as of May 27, with confirmed activity in three provinces.

DRC Suspected Burden

1,077

Suspected cases still far outnumber confirmed cases, making surveillance, testing, and reclassification crucial.

Confirmed Deaths

18

CDC reports 17 confirmed deaths in DRC and one confirmed death in Uganda.

Uganda Confirmed Cases

7

Uganda reports seven confirmed cases and one death, with five cases linked to the first two confirmed cases.

Map & Image Area

Current visual references

CDC affected-area map: CDC includes a current map showing affected provinces in northeastern DRC near Uganda and South Sudan, along with linked Uganda cases.

Open CDC Map Source

ECDC visual page: ECDC has a dedicated outbreak page with an affected-area image and explanatory public-health graphics.

Open ECDC Visuals

Image note: Use CDC, WHO, ECDC, AP, Reuters, or ministry-of-health visuals only when licensing, embed rules, or your publishing platform allows it. For this archive block, the safest approach is to link directly to the source map or visual page rather than hotlinking images.

Secondary Watchlist

Andes hantavirus cruise-ship cluster

CDC’s May 18 health update says WHO was notified on May 2 of a severe acute respiratory illness cluster aboard the M/V Hondius, with WHO confirming Andes virus on May 6. CDC notes Andes virus is the only known hantavirus that can spread person to person, though this is rare and usually tied to prolonged close contact. As of May 18, no confirmed U.S. cases tied to the ship had been reported, and CDC considered overall risk to the American public extremely low.

Read CDC hantavirus health update

ECDC Week 21 threat report

ECDC’s Week 21 Communicable Disease Threats Report covers May 14 through May 22 and includes updates on hantavirus, chikungunya, the Ebola disease outbreak, avian influenza, measles, and respiratory virus epidemiology in the EU/EEA. It is a useful umbrella source for European cross-border monitoring.

Read ECDC Week 21 threat report

U.S. measles outbreak activity

CDC’s measles dashboard continues to show widespread U.S. outbreak activity in 2026, with 1,952 confirmed cases reported as of May 21 across 40 jurisdictions, plus nine cases among international visitors. CDC lists 29 outbreaks in 2026, with 93% of confirmed cases outbreak-associated.

Read CDC measles data

Global cholera and acute watery diarrhoea pressure

WHO’s cholera and acute watery diarrhoea dashboard remains an important secondary monitor because cholera surges quickly where water systems, displacement, conflict, and flooding overlap. The dashboard continues to track affected countries, recent case movement, and reported deaths.

Open WHO cholera dashboard

CDC travel notices: chikungunya, meningococcal disease, yellow fever, polio, and Ebola

CDC’s travel notice board currently includes Ebola Bundibugyo notices for DRC and Uganda, along with notices for chikungunya, meningococcal disease, yellow fever, and global polio destinations. For travelers, this page is the fastest practical scan before itinerary decisions.

Open CDC travel health notices

Source Notes

  • Most current Ebola count used here: CDC’s May 27 situation summary, citing DRC and Uganda Ministries of Health.
  • Count caution: confirmed cases, suspected cases, confirmed deaths, and suspected deaths are different categories and should not be blended.
  • Conflict is a health variable: WHO and Reuters reporting both show that violence, displacement, clinic attacks, shortages, and distrust are materially slowing outbreak control.
  • Border closures are complicated: closures may reduce formal movement, but they can also push people toward informal crossings where screening and tracing are weaker.
  • Practical watch point: containment depends on whether teams can find cases, isolate the sick, protect healthcare workers, trace contacts, test quickly, and keep movement visible.

Linked References

  1. CDC: Ebola Outbreak Current Situation, updated May 27, 2026
  2. WHO: Director-General remarks on the Bundibugyo Ebola outbreak, May 25, 2026
  3. WHO Disease Outbreak News: Ebola disease caused by Bundibugyo virus
  4. Reuters: WHO says Ebola testing is being scaled up in Congo
  5. ECDC: Ebola disease outbreak in DRC and Uganda
  6. CDC HAN: Hantavirus outbreak testing for potential infection
  7. ECDC: Communicable Disease Threats Report, Week 21, 2026
  8. CDC: Measles cases and outbreaks
  9. WHO: Global Cholera and Acute Watery Diarrhoea Dashboard
  10. CDC: Travel Health Notices

Daily Outbreak Watch

Behold a Pale Horse: May 27, 2026 Briefing

Risk summary: Ebola Bundibugyo remains the lead global concern today, with rapid expansion in eastern DRC, imported cases in Uganda, a WHO-declared PHEIC, and widening travel-screening measures. Secondary watch items include a multi-country Andes hantavirus cruise-ship cluster, U.S. measles outbreak activity, global cholera pressure, and ongoing mpox monitoring.

Lead Threat

Ebola Bundibugyo

DRC and Uganda, PHEIC active

Watch Marker

Cross-Border Spread

Uganda has imported confirmed cases from DRC.

Global Risk

Low, But Active

WHO rates DRC very high, regional high, global low.

Situation Board

Ebola is moving from outbreak response into regional containment mode.

WHO status Public Health Emergency of International Concern for Ebola Bundibugyo in DRC and Uganda.
Current confirmed count WHO Director-General reported 101 confirmed cases and 10 confirmed deaths in DRC, plus five confirmed cases and one death in Uganda, in remarks dated May 25.
Suspected burden More than 900 suspected cases and 220 suspected deaths in DRC, according to WHO remarks on May 25.
Operational concern Insecurity, weak contact follow-up, inadequate isolation and referral systems, and unsafe burial risks are complicating response.
Travel posture CDC has enhanced U.S. travel screening and public-health measures, while Canada announced 21-day self-isolation for travelers arriving from Congo, South Sudan, and Uganda.

Lead Outbreak

Ebola Bundibugyo, Democratic Republic of the Congo and Uganda

WHO’s latest Disease Outbreak News shows rapid growth since the May 16 update, with geographic expansion into North Kivu and South Kivu. Earlier WHO figures dated May 21 listed 746 suspected cases and 176 suspected deaths in DRC, plus 85 confirmed cases across DRC and Uganda. By May 25, WHO’s Director-General reported the known confirmed count had risen to 101 in DRC and five in Uganda, while the wider suspected burden exceeded 900 cases and 220 deaths.

The most important editorial marker is not just the count. It is the combination of a rare Ebola species with no licensed vaccine or specific therapeutic, urban and semi-urban transmission hotspots, porous borders, high mobility, and response disruption from conflict and mistrust. WHO rates the risk as very high nationally in DRC, high regionally, and low globally.

Case & Trend Cards

DRC: Confirmed Ebola

101

Confirmed cases reported by WHO Director-General remarks on May 25, with 10 confirmed deaths in DRC.

DRC: Suspected Ebola

900+

WHO says the DRC epidemic is larger than confirmed counts show, with more than 900 suspected cases and 220 suspected deaths.

Uganda: Imported Ebola

5

Five confirmed cases and one death reported in Uganda, with mass-gathering prevention measures now part of containment.

Contact Follow-Up

21%

WHO reported 1,603 listed contacts in Ituri as of May 21, but follow-up remained weak due to insecurity and movement restrictions.

Map & Image Area

Current visual references

WHO map: Distribution of suspected and confirmed Bundibugyo virus disease cases in DRC and Uganda, as of May 21.

View WHO Map Source

WHO risk map: Health-zone risk mapping for DRC, including Ituri, North Kivu, and South Kivu.

Open Risk Mapping

Secondary Watchlist

Andes hantavirus cluster linked to MV Hondius

ECDC reports a Dutch-flagged cruise-ship cluster involving passengers and crew from 23 countries. As of the ECDC page updated May 26 at 15:00, the cluster included 11 confirmed cases, two probable cases, and three deaths. ECDC says additional cases may still appear after passengers returned home because of the long incubation period, but risk to the EU/EEA general population remains very low.

Read ECDC update

United States measles outbreaks

CDC reports 1,952 confirmed measles cases in the United States in 2026 as of May 21, across 40 jurisdictions, plus nine cases among international visitors. CDC lists 29 new outbreaks in 2026, with 93% of confirmed cases outbreak-associated.

Read CDC measles data

Global cholera and acute watery diarrhoea pressure

WHO’s public cholera dashboard lists 22 affected countries and areas, roughly 70,000 cumulative cases, 17,000 cases reported in the last 28 days, 850 cumulative deaths, and 232 deaths reported in the last 28 days. This remains a broad humanitarian-health watch item, especially where conflict, displacement, flooding, or poor water access overlap.

Open WHO cholera dashboard

Mpox clade I and clade II monitoring

CDC continues to track clade I mpox outbreaks in Central and Eastern Africa, clade Ib activity reported in parts of Western Europe since fall 2025, and low-level clade II circulation. CDC states that the clade I mpox risk to most people in the United States remains low, but travel-associated cases continue to be monitored.

Read CDC mpox situation summary

Source Notes

  • Most authoritative Ebola count today: WHO Director-General remarks from May 25 provide the newest official top-line figures found in this scan.
  • Case counts are moving fast: WHO Disease Outbreak News from May 21 gives fuller health-zone detail, while May 25 remarks provide newer aggregate figures.
  • Do not compare suspected and confirmed counts as equivalent: suspected cases and deaths require investigation and reclassification.
  • Risk does not equal panic: WHO still assesses global Ebola risk as low, but DRC national risk is very high and regional risk is high.

Linked References

  1. WHO Director-General remarks on Bundibugyo Ebola, May 25, 2026
  2. WHO Disease Outbreak News: Ebola disease caused by Bundibugyo virus, May 21 data
  3. WHO IHR Emergency Committee temporary recommendations, May 22, 2026
  4. CDC HAN: Ebola Disease Outbreak in DRC and Uganda
  5. ECDC: Andes hantavirus outbreak in cruise ship
  6. CDC: Measles cases and outbreaks
  7. WHO Global Cholera and AWD Dashboard
  8. CDC: Mpox situation summary