New Mpox Strain Hits US: Clade I Confirmed

The United States has confirmed its first case of clade I mpox, a more virulent form of the virus, in Connecticut. The individual contracted the disease after a recent trip to Western Europe. This development coincides with global health officials monitoring an increase in hantavirus cases in Spain and France.

Mpox, particularly the clade I strain historically found in Central Africa, is associated with more severe illness and higher mortality rates. This contrasts with clade II, which caused the 2022 global outbreak and was generally milder. Health officials emphasize that the current Connecticut case does not endanger the general public but recommend the JYNNEOS vaccine for at-risk individuals. Hantavirus, spread by rodents, can cause severe respiratory illness, though it remains rare. The confirmation of clade I mpox underscores the importance of distinguishing between mpox strains for accurate risk assessment, especially as international travel resumes.