Health officials said Saturday they have confirmed the first U.S. case of a new form of mpox that was first seen in eastern Congo. The person had traveled to eastern Africa and was treated in Northern California upon return,

Health officials on Saturday said they've identified the first person in the U.S. infected with an mpox strain that has recently prompted global health alerts over concerns about its spread, severity and transmissibility.

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