What is the current status of the suspected Ebola case in São Paulo, Brazil, involving a traveler from the Democratic Republic of Congo, and what are the key details about the broader DRC outbreak caused by the Bundibugyo strain — including its spread to Uganda, case and death co

The Broader DRC and Uganda Outbreak (Bundibugyo Strain)

Outbreak Origin and Spread

The DRC declared its 17th Ebola outbreak on May 15, 2026, after cases were confirmed in Ituri Province . The outbreak is caused by the Bundibugyo virus (species Orthoebolavirus bundibugyoense) . It has spread within the DRC to North Kivu and South Kivu Provinces, and has crossed into Uganda — where an imported case from DRC (a Congolese man who died in Kampala) triggered a separate declaration of outbreak .

Case and Death Counts (as of May 29, 2026)

Source: ECDC Weekly Threat Report, May 30, 2026 . Note that total suspected and confirmed cases combined exceed 1,262 .

No Approved Vaccine or Specific Therapeutic

The Bundibugyo strain has no approved vaccine or specific antiviral treatment . This is a critical distinction from the Zaire strain of Ebola, for which vaccines (e.g., Ervebo) and therapeutics exist. The WHO notes that work is ongoing to test promising candidates, but none are yet licensed for Bundibugyo .

Fatality Rate

Among confirmed cases, the case fatality rate is approximately 13.4% (18 deaths out of 134 confirmed cases) . However, the overall suspected-case fatality rate is higher, and historical data on Bundibugyo outbreaks have shown higher mortality. The true rate remains uncertain due to the large number of suspected cases still under investigation.

International and Brazilian Response Measures

Brazil's National Contingency Plan

Brazil's Ministry of Health has a pre-existing Plano de Contingência para Doença pelo Vírus Ebola (National Contingency Plan for Ebola Virus Disease), which defines federal responsibilities and organizational structures to respond to a potential introduction of the virus into Brazilian territory . The suspected case in São Paulo has triggered activation of these protocols, with the patient placed in isolation and testing underway .

WHO Emergency Declaration

On May 17, 2026, WHO Director-General Dr. Tedros Adhanom Ghebreyesus declared the Bundibugyo virus outbreak a Public Health Emergency of International Concern (PHEIC) — the highest level of alert under the International Health Regulations .

MSF (Médecins Sans Frontières) Response

MSF has deployed teams to the affected areas in DRC and Uganda, establishing Ebola treatment centers and supporting case management, contact tracing, and community engagement. As of mid-May, MSF reported hundreds of suspected cases in DRC, with treatment centers operating in Ituri and North Kivu .

CDC Support and U.S. Travel Measures

• CDC Health Alert Network (HAN) Advisory: The CDC issued HAN Health Advisory #00530 on May 19, 2026, alerting clinicians and public health practitioners about the outbreak .
• Entry Restrictions: The CDC temporarily restricted entry for certain travelers recently in DRC, Uganda, or South Sudan. U.S. citizens and nationals may still enter but must undergo enhanced public health screening .
• Enhanced Screening at U.S. Airports: Screening was expanded to Hartsfield-Jackson Atlanta International Airport (May 22) in addition to existing screening at Washington-Dulles and other airports .
• Travel Health Notices: CDC posted a Level 4 — Avoid All Travel notice for Uganda due to Bundibugyo virus disease, and a similar high-level advisory for DRC .
• U.S. State Department: Raised the DRC travel advisory to Level 4 — Do Not Travel due to the Ebola outbreak in Ituri Province .

International Screening and Travel Guidance

ECDC considers entry screening of returning travelers from affected areas to be of limited effectiveness for preventing introduction into Europe . WHO advises against border closures or travel/trade restrictions, but recommends exit screening at international airports in affected countries .