We report a prospective study of mouse brain derived inactivated Japanese encephalitis (JE) vaccine, given in 3-dose EPI program to human immune deficiency virus (HIV)-exposed Thai infants. 18 HIV-infected receiving antiretroviral therapy with median baseline CD4 of 33.1%, and 92 HIV-uninfected children were studied. All but one HIV-infected child seroconverted after the second dose. The geometric mean titers (GMTs) 3 months after the second and third doses in HIV-infected vs HIV-uninfected children were 247 vs 938 (p=0.022), and 2273 vs 24069 (p=0.009), respectively. Urticaria or angioedema found in 4% and 6% in HIV-infected and -uninfected children, respectively (p=1.0). The vaccine was safe and immunogenic but antibody response in HIV-infected children was not as high as in uninfected children.
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