Anaphylactic rx to prior dose or to any vaccine component; moderate or severe acute illness (do not postpone for minor illness). Pregnancy or possibility of pregnancy within 1mo. If blood, plasma, or immune globulin (IG or VZIG) were given in past 5mo. Immunocompromised persons (because of high doses of systemic steroids, cancer, leukemia, lymphoma, immunodeficiency). Note: manufacturer recommends no salicylates for 6wks after this vaccine.