A California resident has been infected with the more severe type of mpox virus, the first U.S. case of a virus that has sickened thousands and killed hundreds in an outbreak in Central and Eastern Africa, health officials said Saturday. The individual ...

The first case in the U.S. of a more severe strain of mpox was reported in San Mateo County, the California Department of Public Health said.

The unidentified patient had recently returned from Africa, where the virus has caused a deadly epidemic, health officials said.