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Safety of and Immunogenicity to an H1N1 Influenza Vaccine in HIV-infected Adults

2014-08-27 03:12:30 | BioPortfolio

Summary

This is a randomized, open label, phase II trial to evaluate the safety and immunogenicity of two different schedules of vaccination against influenza A H1N1 in HIV-infected individuals, in which each of the randomized groups will be compared with HIV-negative volunteers vaccinated with the regimen indicated by the Brazilian National Immunization Program. Will be included in the study HIV-infected patients, stratified by CD4 count (< 200 cells/mm3 or > 200 cells/mm3) at the time of screening for the study, not receiving antiretroviral therapy treatment or receiving stable treatment for at least 8 weeks, with no plans to change over the next 6 months, eligible to receive vaccine against influenza A H1N1. The control group will be formed by HIV-negative individuals, confirmed by serology performed at screening, eligible to receive vaccine against influenza A H1N1. Patients infected with HIV will receive one of two possible vaccination regimens: 1) 3.75 µg in two applications 21 days apart, 2) 7.5 µg in two applications 21 days apart. The volunteers in the control group will receive a single application of 3.75 µg dose of the vaccine. The study's hypotheses are: 1) The vaccine against the H1N1 virus promotes antibody titers above the level specified for protection (seroconversion), being as safe and well tolerated in patients HIV-1 infected as in non HIV-infected volunteers; 2) The proportion of seroconversion for H1N1 virus vaccine at a dose of 3.75 µg in HIV-1-infected patients is similar to the proportion of seroconversion induced by the same vaccine at a dose of 7.5 µg; 3)The proportion of seroconversion with one dose of the vaccine against H1N1 virus is similar to the proportion after the second dose.

Study Design

Allocation: Randomized, Control: Active Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Prevention

Conditions

HIV Infection

Intervention

Adjuvanted vaccine against H1N1 influenza virus (GSK), Adjuvanted vaccine against H1N1 influenza virus (GSK), Adjuvanted vaccine against H1N1 influenza virus (GSK)

Location

Instituto de Pesquisa Clinica Evandro Chagas (IPEC) - Fiocruz
Rio de Janeiro
Brazil

Status

Recruiting

Source

Oswaldo Cruz Foundation

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:12:30-0400

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