After 64 Measles Cases, Chicago's Outbreak Ends

The Chicago Department of Public Health (CDPH) today declared the recent outbreak of measles in the City of Chicago officially over. Two full incubation periods (42 days) have passed without any new measles cases.

On March 7, 2024, CDPH confirmed the first case of measles in Chicago in five years. In total, 64 individuals tested positive for measles, 57 of whom were associated with a shelter setting.

Over 30,000 measles-mumps-rubella vaccine doses have been administered to Chicago residents.

CDPH Commissioner Dr. Olusimbo Ige said in a press release on May 31, 2024, “Our goal is the elimination of measles in Chicago and everywhere, and with proper vaccination coverage, we know that zero is possible.”

For those who are traveling internationally, additional measles vaccinations may be recommended. Talk with your healthcare provider (doctor, nurse, pharmacist) before traveling about vaccinations you and your family may need, wrote CDPH.

As of May 30, 2024, the U.S. CDC reported a total of 146 measles cases in 21 jurisdictions: Arizona, California, Florida, Georgia, Illinois, Indiana, Louisiana, Maryland, Michigan, Minnesota, Missouri, New Jersey, New York City, New York State, Ohio, Pennsylvania, Vermont, Virginia, Washington, West Virginia, and Wisconsin.

There have been 11 outbreaks (three+ cases) reported in 2024.

Globally, measles cases have been confirmed in 52 countries in the past year by the CDC.