By 1980, every U.S. state had vaccine-related laws concerning children before they entered school, with some states allowing county public health boards to decide which vaccines were required.
Sources
- Vaccine requirements and vaccine research highlights - Mayo Clinic (mayoclinic.org)
- https://www.kff.org/other-health/state-and-local-policies-on-school-vaccine-requirements-overview-and-current-status/ (kff.org)
- https://www.cdc.gov/mmwr/preview/mmwrhtml/su6004a9.htm (cdc.gov)
- https://www.cdc.gov/mmwr/preview/mmwrhtml/00001091.htm (cdc.gov)
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