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Emerging & Communicable Diseases

This page provides information and resources on emerging or communicable diseases highlighted by the Health Department. 

Monkeypox Virus (mpox)

In the spring of 2023, the CDC began investigating a cluster of mpox cases in the Chicago area. From April 17 to May 5, 2023, a total of 12 confirmed and one probable case of mpox were reported to the Chicago Department of Public Health. All cases were among men, all had symptoms, and nine - or 69% of the cases – had received 2 JYNNEOS vaccine doses.

The CDC anticipates that the spring and summer seasons of 2023 could lead to a resurgence of mpox as people gather for festivals and other events. See below for vaccine recommendations, signs, symptoms and how to prevent the spread of mpox.