CDC alerts of ongoing mpox transmission and potential summer risk.

The CDC has issued an alert for a resurgence of new mpox (formerly monkeypox) cases in the Chicago area, with 12 confirmed cases and one probable case reported between April 17 and May 5. The majority of cases were of non-Hispanic White men, and four of the men recently traveled out of state. Nearly 70% of the infected men had received two doses of the JYNNEOS vaccine. Mpox is an infectious disease caused by the monkeypox virus that primarily affects men who have sex with men. A two-dose vaccine, JYNNEOS, is available to protect against both mpox and smallpox.