8784b9b1_unization_policy_for_providers__How_Often
[Immunization] Measles, Mumps, Rubella (MMR) [Why] Measles: 2-3 people out of every 1,000 who contract measles die from complications such as pneumonia or encephalitis. Encephalitis is an inflammation of the brain, which can lead to convulsions, deafness, or mental retardation. Measles during pregnancy increases the risk of premature labor, spontaneous abortion, and low birth weight. Mumps: 15% of cases are in adolescents and adults. Mumps may cause inflammation of the pancreas or sexual organs and may cause permanent deafness or sterility. Rubella: 15% of young adults are susceptible. Rubella may cause miscarriage, stillbirth, and multiple birth defects (congenital disorders, mental retardation) if contracted in the first trimester of pregnancy. [How Often] 
Child care providers should be immune to measles, mumps, and rubella. Providers born before 1957 can be considered immune to measles and mumps. Others can be considered immune if they have a history of measles or mumps disease or have received at least one dose of rubella vaccine on or after their first birthday. Because a history of rubella disease is often unreliable, only a blood test indicating Immunity to rubella or documented receipt of at least one dose of rubella vaccine is adequate proof of immunity. Measles, mumps, and rubella vaccines are usually given together as MMR. Many experts recommend two doses of MMR for persons without other evidence of immunity.
Health History and immunization policy for providers
How Often