HIV-1 Plasma Viremia not Increased in Patients Receiving Highly Active Antiretroviral Therapy After Influenza Vaccination

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 The effect of vaccinating patients with sustained undetectable HIV-1 viremia (VL) achieved with highly active antiretroviral therapy was prospectively investigated. During the 1998 influenza immunization period, 39 HIV-1-infected patients who showed a VL<20 copies/ml for at least 6 months before the study entry date were vaccinated for influenza. Twenty-two vaccinees were immunized at entry. Seventeen controls were followed for 4 weeks after entry, crossing over then to the vaccination group. The proportion of patients with undetectable VL was not significantly different between the vaccination and control groups 2 and 4 weeks after entry. Therefore, influenza immunization of patients with undetectable viremia achieved with highly active antiretroviral therapy does not seem to affect VL.