Active clinical trials for "Influenza, Human"

In the 20th century, influenza pandemics occurred in 1918, 1957, and 1968, and were associated with significant morbidity and mortality. It is estimated that, in the United States alone, the next influenza pandemic could cause approximately 200,000 deaths and 750,000 hospitalizations. Thus, the development of a vaccine against potential influenza strains has become a priority. The purpose of this study is to determine the safety and immune response to an H6N1 influenza vaccine candidate.

The objectives of this study are to assess the dose-related safety and immunogenicity of six different dose levels of inactivated, Vero cell-derived reverse genetic reassortant A/H5N1/Indonesia/05/2005 influenza vaccine in a healthy young adult population. Subjects will receive 2 vaccinations (21 days apart) at the dose to which they were assigned. Blood will be drawn from all subjects for serum antibody determination on Days 0, 21, 42 and 180. Body temperature will be measured daily for 6 days following vaccination. Injection site reactions and systemic reactions will be monitored throughout the entire 180 days of the study. Safety data obtained at 7 days after the first vaccination for all dose levels in Cohort 1 will be reviewed by a Data Monitoring Committee and a recommendation will be obtained whether to proceed to the second vaccination of Cohort 1 and to the first vaccination of Cohort 2.

The purpose of this observer-blind study is to determine whether GSK's avian flu vaccine GSK 1557484A is immunogenic when given to adults aged 18-64 years.

Primary Objective: To provide the Center for Biologics Evaluation and Research (CBER) with sera collected from healthy children receiving the 2008-2009 formulation of the inactivated, split-virion influenza vaccine Fluzone® for further study. Observational Objectives: To describe the safety of the 2008-2009 pediatric formulation of Fluzone® vaccine, administered in a one- or two-dose schedule in accordance with Advisory Committee on Immunization Practices (ACIP) recommendations, in children ≥ 6 months to < 5 years of age. To describe the immunogenicity of the 2008-2009 pediatric formulation of Fluzone® vaccine, administered in a one- or two-dose schedule in accordance with ACIP recommendations, in children ≥ 6 months to < 5 years of age.

Vaccination of HIV infected individuals with the sub-unit influenza vaccine is safe; however it induces only moderate immune responses and likewise is modest in its protection compared to HIV uninfected individuals. Based upon the available data, the South African Thoracic Society has provisionally recommended the use of influenza vaccine in HIV infected individuals with CD4+ counts of > 200/ml and viral loads of < 100 000 copies/ml.(Green R et al. In press, SAMJ). This proposal is however based upon recommendations made elsewhere with minimal level of evidence regarding its benefit, and no evidence from countries with a high prevalence of HIV. Very few HIV infected adults, however, actually do receive influenza vaccine in South Africa, partly because of the absence of compelling data regarding the burden of disease in Africa as well as lack of vaccine effectiveness and issues related to physician awareness and access to influenza vaccine in the public immunization program. The conflicting evidence, between developed countries and Africa, regarding the effectiveness of PPV highlight the drawbacks of extrapolating vaccine effectiveness data from developed countries to developing countries. Differences in the epidemiology of HIV between developed countries in which the prevalence of HIV is low to that of high-burden sub-Saharan African countries include: differences in the mode of transmission of HIV and demographics of the infected population. differences in standard of care, including access to prophylaxis against opportunistic infections and use of highly active anti-retroviral therapy (HAART) differences in risk for disease from opportunistic pathogens, e.g. Mycobacterium tuberculosis, etc. These differences may all contribute to differences in the risk and severity of influenza illness among HIV infected adults from these communities as well as possibly responsiveness and effectiveness of vaccination. The investigators are conducting a double-blinded, placebo controlled randomized trial at the HIV treatment clinic at Helen Joseph Hospital to determine the effectiveness of influenza vaccination in HIV infected adults in South Africa. The significance of the findings from this study will help quantify the burden of influenza illness in African HIV infected adults, as well as assist in making more informed recommendations for the use of influenza vaccine in HIV infected adults and in guiding national policy for preparing for a future influenza virus-pandemic.

The purposes of this research study are: to see if there is a difference in the quantity of protective influenza antibodies produced by different doses of the Fluviral vaccine to see if these different vaccine dosing schedules reduce flu-like illness and/or reduce laboratory documented influenza in HIV Infected adults.

Annual trial for registration influenza vaccine Begrivac with strain composition for season 2010/2011.

The present phase III study aims to evaluate the safety and immunogenicity of MF59-adjuvanted subunit seasonal influenza vaccine and to evaluate the consistency in the manufacturing process of three consecutive lots of MF59-adjuvanted subunit seasonal influenza vaccine with respect to immunogenicity in subjects aged 65 years and older. The active comparator non-adjuvanted seasonal influenza vaccine is approved for use in this age group in the United States and will be used to provide a comparative assessment for immunogenicity and safety.

The purpose of this study is to comply with the post marketing condition to the exceptional approval of Arepanrix™ in Japan and to assess the immunogenicity and safety of GSK Biologicals' H1N1 influenza vaccine healthy Japanese adults 65 years of age or older.

This study is designed to characterize the safety and immunogenicity of a' pandemic influenza (H1N1) candidate vaccine GSK2340274A in adults 19 to 40 years who have never received influenza vaccination.