Prevalence and Persistence of Varicella Antibodies in Previously Immunized Children and Youth With Perinatal HIV-1 Infection. - Purswani MU; Karalius B; Yao TJ; Schmid DS; Burchett SK; Siberry GK; Patel K; Van Dyke RB; Yogev R; Lurie RH; Sanders MA; Malee K; et al. (Clinical infectious diseases : an official publication of the Infectious Diseases Society of America, 2016)