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MMR vaccine
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- 1Illinois reports 23 measles cases, urges vaccination checks▼Illinois reports 23 measles cases in 2026, urges residents to check vaccinations
Illinois health officials have confirmed 23 measles cases in 2026 and are urging residents to verify their vaccination status. The state is encouraging people to check their immunization records as the outbreak continues, a reminder of the disease's high contagiousness. Officials recommend the MMR vaccine for anyone not fully protected.