New Monkeypox Strain Detected in US for First Time

To date, there have been 3,100 confirmed cases of the strain, mostly centered in three central African countries.

A colorized electron microscope image shows mpox virus particles, found within infected cells. NIAID via AP

Health officials have confirmed the first detected case of a new strain of monkeypox (mpox) in the United States.

The clade I strain, which was first reported in the eastern Congo earlier this year, was found in a traveler who had returned from eastern Africa to northern California, the California Department of Public Health (CDPH) said on Nov. 16.