Hypersensitivity to eggs (low risk for anaphylactic reactions in childn). Adequate treatment provisions including epinephrine inj should be available for immediate use if anaphylactic or anaphylactoid reaction occur. Do not inj intravascularly. Obtain vaccination history & determine previous reactions to any vaccine, including ProQuad, Varivax, or any MMR-containing vaccines prior to administration. History of convulsions, cerebral injury or any other condition in which stress due to fever should be avoided. HIV w/ or w/o evidence of immunosuppression. May not protect all vaccine recipients. Avoid close association w/ high-risk individuals (eg, immunocompromised, pregnant women w/o documented +ve history of varicella or lab evidence of prior infection & their newborns) susceptible to varicella for up to 6 wk following vaccination. Administer vaccine subcutaneously to individuals w/ thrombocytopenia or any coagulation disorder; bleeding may occur following IM administration. Post-exposure prophylaxis. May result in temporary depression of tuberculin skin sensitivity; administer tuberculin test any time before, simultaneously w/ or at least 4-6 wk after ProQuad. Concomitant vaccination w/ diphtheria, tetanus & acellular pertussis. Not to be given concomitantly w/ Ig or varicella-zoster Ig. Avoid pregnancy for 3 mth following vaccination in females of childbearing age. Lactation. Not recommended for infant <12 mth. Childn w/ untreated TB. Adolescents & adults. Not indicated for elderly >65 yr.