The patient was traveling from East Africa, where the mpox disease is endemic. The CDC says the strain does not present a high risk to the general population.

There is no evidence that the mpox clade I strain is spreading between people in California or elsewhere in the U.S.

The United States’ first known case of a more severe strain of mpox was confirmed in California, the US Centers for Disease Control and Prevention said Saturday. The risk of clade I mpox to the public remains low,