Disseminated Vaccine Strain Varicella as the Acquired Immunodeficiency Syndrome-Defining Illness in a Previously Undiagnosed Child

The Food and Drug Administration licensed a live-virus varicella vaccine (Varivax; Merck however, since licensure and increased vaccine use, rare previously undetected risks have arisen. Presented here is the clinical course of a previously undiagnosed, human immunodeficiency virus-infected boy who developed dissemination of the vaccine strain of varicella zoster after immunization. chickenpox, human immunodeficiency virus, pneumonia, encephalopathy, varicella vaccine, adverse events, dissemination.