What Changed Since Last Report

The outbreak has worsened on multiple fronts.

As of May 23, the CDC confirmed a new case in Sud-Kivu Province — the virus has now broken out of Ituri and Nord-Kivu into a third Congolese province.

Total numbers as of Friday, according to the CDC and The Print: 91 confirmed infections, 867 suspected cases, and 204 probable deaths in the DRC. Uganda now sits at 5 confirmed cases and 1 confirmed death, with Uganda's Ministry of Health announcing 3 additional cases on May 23 — all with traceable links to travelers from DRC.

The Contact Tracing Crisis

Only 1-in-5 contacts under monitoring have actually been traced.

According to The Print, health workers identified 1,745 contacts who need monitoring. They've reached roughly 20% of them. Officials described the surveillance gap as "alarming."

When 80% of potentially exposed contacts cannot be found for a virus that kills roughly a third of those it infects, containment becomes impossible.

Flights Grounded, Supplies Running Thin

Congo's transport ministry suspended all commercial, private, and special flights to and from Bunia — one of the outbreak's main epicenters in Ituri province, near the Ugandan border. Humanitarian and medical flights may still get special authorization.

According to The Print, the flight suspension reflects how rapidly the Bundibugyo strain is spreading through eastern Congo. It's also straining an already fragile health system.

Supplies are running low. Health workers have limited equipment. There is no approved vaccine or antibody treatment for the Bundibugyo strain specifically.

The American Patient and What Washington Did

On May 17, an American caring for Ebola patients in DRC tested positive for Ebola Bundibugyo, according to the CDC. The patient was transported to Germany for treatment — not the United States — because Germany has prior experience treating Ebola and offered shorter travel time from the region.

High-risk contacts were relocated to Germany and the Czech Republic.

On May 18, the CDC and Department of Homeland Security announced enhanced travel screening and entry restrictions for travelers from DRC, Uganda, and South Sudan. The U.S. issued a formal order suspending entry for certain persons from countries with quarantinable communicable diseases.

As of May 23, the CDC confirmed: zero Ebola cases have been confirmed in the United States from this outbreak. Overall risk to the American public remains low.

What the WHO Said

On Friday, the World Health Organization raised the public health risk in DRC from "high" to "very high." WHO Director-General Dr. Tedros Adhanom Ghebreyesus said regional risk across Africa is high, but global risk remains low.

The distinction matters: low global risk does not mean contained. It means the virus hasn't jumped continents yet. The DRC and Uganda face a different situation.

What Coverage Is Missing

Most outlets lead with the American patient or flight suspensions. The contact tracing failure deserves more prominence.

With only 20% of known exposures monitored, case counts likely undercount the true spread. The 867 suspected cases and 204 probable deaths are likely lower estimates.

The BBC identified that three Red Cross volunteers — Alikana Udumusi Augustin, Sezabo Katanabo, and Ajiko Chandiru Viviane — were likely infected on March 27 while handling bodies in Mongwalu, before the outbreak was known. This means the virus had a significant head start before response efforts began.

Another critical factor: Bundibugyo strain has no proven vaccine. Previous outbreak narratives — from 2014 and 2019 — involved strains where vaccines existed or were rapidly deployed. This situation differs. The available tools are more limited.

What This Means

Americans without plans to travel to DRC, Uganda, or South Sudan face low immediate risk.

A virus with a roughly 30% kill rate, no approved vaccine, active spread across three provinces and an international border, and an 80% contact tracing failure rate presents challenges that airport screening alone cannot resolve.

The U.S. government has acted. Germany has the American patient. Borders are being monitored. Whether these measures suffice depends on whether Congo and Uganda can improve surveillance — and current indicators are not positive.