A California resident has tested positive for mpox clade I. This strain has spread rapidly in parts of Africa. The development marks the first recorded case of clade I mpox in the United States. The infected person recently returned from East Africa to Sonoma County.
So far, there is no evidence that clade I is spreading in the U.S. Experts say the risk to the general population remains low. Still, the presence of clade I in the U.S. shows how mpox is continuing to spread globally.
In August, the World Health Organization (WHO) declared mpox a global health emergency. It confirmed this status again during a meeting in November.