Vaccination is contraindicated in Patients with moderate to severe acute concurrent illness (vaccination is postponed until illness resolves) Immunocompromised patients Pregnant women and those who intend to become pregnant within 1 month of vaccination (based on Centers for Disease Control and Prevention recommendations) or within 3 months of vaccination (based on vaccine labeling) Patients taking high doses of systemic corticosteroids Children using salicylates Postexposure prophylaxis After exposure, chickenpox can be prevented or attenuated by intramuscular (IM) administration of varicella-zoster immune globulin (VariZIG).