At a glance
US kindergarten MMR vaccination rates declined while medical and personal belief exemptions reached record levels. The Guardian found the shift creates potential for disease outbreaks in schools.
US kindergarten MMR vaccination rates declined while medical and personal belief exemptions reached record levels. The Guardian found that the shift creates conditions for disease outbreaks in schools. Vaccination rates below a certain threshold create community vulnerability.
MMR vaccines work through herd immunity—they need a certain percentage of people vaccinated to protect everyone, including those who can't be vaccinated. When that percentage drops below roughly 95%, the herd immunity breaks down. If exemptions are hitting record highs and vaccination rates are falling, schools are approaching or crossing that threshold in multiple places.
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