Postpone vaccination in patients w/ acute severe febrile illness. Syncope (fainting) can occur. Allow evaporation of alcohol & other disinfecting agents from the skin before inj. Limited protection up to 72 hr after exposure to natural measles. Rare anaphylactic event; patients who have experienced anaphylaxis after egg ingestion. History or family history of allergic diseases or convulsions. Thrombocytopenia; immunocompromised patients. Do not administer intravascularly. Do not perform tuberculin testing w/in 4-6 wk after vaccination. Delay vaccination at least 3 mth in patients who have received human γ-globulins or blood transfusion. Avoid pregnancy 1 mth after vaccination. Lactation. Infants <12 mth (except for high-risk cases).