CDC Issues Health Alert After More Aggressive Mpox Strain Found in US for 1st Time

No additional mpox cases in the United States have been discovered as of Nov. 18, the CDC says.

A colorized electron microscope image shows Mpox virus particles (orange) found within infected cells (green). NIAID via AP

The U.S. Centers for Disease Control and Prevention issued a health alert on Monday for a more dangerous strain of mpox, also known as monkeypox, that was detected in the United States in recent days.

In a health alert, the CDC said that the first case of clade I mpox was discovered in the United States in California after the infected person “had recently traveled to areas experiencing clade I monkeypox virus.”