The Michigan Department of Health and Human Services is recommending early administration of the MMR vaccine (ages 6–11 months) for infants in select southeast Michigan counties due to confirmed measles cases and concern for community transmission.

Recent cases in Washtenaw County and Monroe County—including at least one not clearly linked to travel—suggest potential local spread. This aligns with broader national trends, as measles cases and outbreaks continue to increase in 2026. 

Key considerations for primary care:

• Early MMR dose (6–11 months): Recommended for infants living in or traveling to affected and surrounding counties (including Wayne, Oakland, Jackson, Livingston, and Lenawee). 
• Series completion required: Infants receiving an early dose must still complete the routine 2-dose series starting at 12–15 months. 
• Assess immunization status: Review records for all pediatric and adult patients; offer catch-up vaccination where appropriate. 
• Reinforce vaccine effectiveness: Two MMR doses provide ~97% protection against measles. 

Measles remains one of the most contagious infectious diseases, with transmission possible before symptom onset and via airborne spread. Early identification, vaccination, and prompt reporting of suspected cases are critical to limiting further spread in outpatient and community settings. 

Primary care practices play a key role in outbreak mitigation through proactive vaccination, patient education, and adherence to public health guidance.

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