People walk in front of The Nairobi Hospital where Kenya's first Ebola virus patient was treated and died, Tuesday, Oct. 6, 2026. (AP Photo/Andrew Kasuku)

A security guard wears a mask at the Ministry of Health after Kenya announced the first case of Ebola, in Nairobi, Tuesday, Oct. 6, 2026. (AP Photo/Andrew Kasuku)

Kenya Health minister Aden Duale speaks to journalists as he announces the first case of Ebola virus in Kenya, Nairobi, Tuesday, Oct. 6, 2026. (AP Photo/Andrew Kasuku)

Prof. Dr Georg Nagel poses for a photo during a ceremony in which he was presented with the University of Würzburg’s 2024 Röntgen Medal (Science Prize), in May 2024, in Würzburg, Germany. (Rudi Merkl, University of Würzburg via AP)

A map showing the locations of the Irkutsk Anti-Plague Research Institute and the nearby quarantined hospital. (AP Digital Embed)

This undated photo released in 2019 by the Irkutsk Anti-Plague Research Institute of Siberia and Far East, shows the institute workers in a lab. (The Irkutsk Anti-Plague Research Institute of Siberia and Far East via AP) ADDITION: adding photo was released in 2019

Parti Quebecois Leader Paul St-Pierre Plamondon watches results come in alongside his spouse Alexandra Tremblay, children Maurice, Laurette and Henri in Montreal, Quebec on Monday, Oct. 5, 2026. (Graham Hughes/The Canadian Press via AP)

Canada Prime Minister Mark Carney rises during Question Period in the House of Commons on Parliament Hill in Ottawa on Monday, Oct. 5, 2026. (Justin Tang/The Canadian Press via AP)