Karl Deisseroth, one of the three recipients of the 2026 Nobel Prize in medicine, talks on his mobile at home on Monday, Oct. 5, 2026, in Stanford, Calif. (AP Photo/Noah Berger)

Karl Deisseroth, one of the three recipients of the 2026 Nobel Prize in medicine, smiles at home on Monday, Oct. 5, 2026, in Stanford, Calif. (AP Photo/Noah Berger)

Karl Deisseroth, one of the three recipients of the 2026 Nobel Prize in medicine, talks to his wife Michelle Monje-Deisseroth at home Monday, Oct. 5, 2026, in Stanford, Calif. (AP Photo/Noah Berger)

FILE -An aerial view of the slum of Kibera with the Nairobi skyline in the background, Kenya, Jan. 4, 2008. (AP Photo/Riccardo Gangale, File)

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)