US Centers for Disease Control and Prevention criteria for evidence of immunity to measles

At least one of the following:
Written documentation of adequate vaccinations including 1 or more doses of measles vaccine given after 12 months of age (preschool-age children) and adults “not at high risk”
Written documentation of 2 doses of vaccine for school-age children and adults at high risk: college students, healthcare personnel, and international travelers
Laboratory evidence of immunity
Laboratory confirmation of measles
Birth before 1957
  • Information from reference 4.