People put on masks at the entrance of The Nairobi Hospital where Kenya's first Ebola virus patient was treated and died, Tuesday, Oct. 6, 2026. (AP Photo/Andrew Kasuku)

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)

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

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

FILE - Arizona voters come and go as cast their ballots at a polling location on primary election day, Tuesday, July 21, 2026, in Phoenix. (AP Photo/Ross D. Franklin, File)