Influenza surveillance in a cohort of HIV-infected children and adolescents immunized against seasonal influenza.

During the 2006-2007 season, 19 HIV-uninfected and 33 HIV-infected children and adolescents with full immunovirologic response to HAART were immunized against influenza and subsequently followed up. One month post-immunization all subjects had protective antibodies titres which persisted for the whole influenza season. Seven vaccinees (four HIV-infected and three HIV-uninfected) were found to be infected by influenza viruses during the epidemic, but disease was lab-confirmed only in two HIV-infected subjects. Both presented a benign clinical course and were infected by an A/Brisbane/10/07-H3N2-like virus. These data indicate that HIV-infected subjects benefit from routine seasonal influenza vaccination.