Active clinical trials for "Influenza, Human"

The purpose of this study was to determine the dose-related safety, immunogenicity, and protective efficacy of a trivalent recombinant hemagglutinin influenza vaccine in healthy adults.

As influenza vaccine efficacy is reported to be lower in elderly subjects compared to healthy adults, probably as a result of immunosenescence, there is a desire to devise ways to increase the current vaccines efficacy for this target population. Adjuvants are known to boost immune responses, thus representing one way to increase the efficacy of the current GlaxoSmithKline Fluarix™ influenza vaccine in elderly subjects. The purpose of this study is to evaluate the immunogenicity and the reactogenicity of a vaccination with four different adjuvanted GlaxoSmithKline influenza vaccines administered to elderly subjects. For immunogenicity and safety evaluations, healthy adults aged 18 to 40 years old and elderly aged 65 years and older will receive Fluarix™ and form the control groups of this trial.

The purpose of this research is to compare reactions and antibody responses following receipt of different doses of the experimental influenza vaccine or standard influenza vaccine.

Today, the leading contender for the next pandemic of influenza is H5N1, a strain of avian virus. Prevention and control of a pandemic will depend on the rapid production and worldwide distribution of specific pandemic vaccines. Candidate 'pandemic-like' vaccines must be developed and tested in clinical trials to determine the most optimal formulation and the best vaccination schedule.This study is designed to test in healthy adults aged between 18-60 years the reactogenicity and immunogenicity of one and two administrations of a candidate pandemic H5N1 vaccine formulated from Split Virus. The vaccines contain different antigen doses . For each dose, adjuvanted vaccine will be compared to the plain vaccine in order to detect the optimal formulation for immunization against the H5N1 influenza strain.

The purpose of this study is to evaluate safety and immunogenicity of a single intramuscular (IM) injection of an adjuvanted influenza vaccine in elderly subjects.

To provide serum to the Food and Drug Administration (FDA) for use by FDA, the Centers for Disease Control and Prevention (CDC), and the World Health Organization (WHO) for characterization of circulating influenza strains. Observational Objectives: To describe the safety of the 2005-2006 pediatric formulation of Fluzone vaccine, given in the two-dose schedule in accordance with the Package Insert, in children aged ≥ 6 months to < 36 months. To describe the immunogenicity of the 2005-2006 pediatric formulation of Fluzone vaccine, administered in a two-dose schedule in accordance with the Package Insert, in children aged ≥ 6 months to < 36 months.

Vaccination is currently the most effective mean of controlling influenza and preventing its complications and mortality in persons at risk. Because of the variable nature of influenza viruses, the composition of influenza vaccines changes almost every year, to target the 3 main circulating strains. Each year the influenza vaccine formulation may thus be different and clinical studies are mandated to ensure that the immunogenicity and safety of the vaccine formulated from the three annual circulating strains are similar to what was observed during the previous years. This study is designed to test the immunogenicity and reactogenicity of the Fluarix™ vaccine containing the influenza strains recommended for the 2006-2007 season.

The purpose of this study is to determine whether a third dose of vaccines containing A/Vietnam/1203/04 provides more immunity than two doses. Subjects who participate in this study will have participated in DMID protocol 04-063 involving the A/Vietnam/1203/04. In this study, each subject will be asked to receive a third dose of the H5 vaccine at the same level administered in protocol 04-063. Subjects will be asked to record oral temperature and any experienced side effects for 7 days following the vaccine. Study procedures will include up to 3 blood sample collections. Participants will be involved in study related procedures for up to 6 months.

The purpose of this study is to compare two licensed influenza vaccines (Fluzone and Fluarix) in terms of the immune response elicited and the safety/ any symptoms that may occur for up to six months after vaccination.

This study evaluates the immunogenicity and consistency of 3 Hib-MenCY-TT vaccine lots and the safety and immunogenicity of Hib-MenCY-TT vaccine compared to a control group receiving licensed Hib conjugate vaccine, when each are co-administered with Pediarix® to healthy infants at 2, 4, and 6 months of age. The study will also evaluate the safety and immunogenicity of Hib-MenCY-TT vaccine compared to a control group receiving licensed Hib conjugate vaccine, when each are co-administered with M-M-R® II and Varivax® at 12 to 15 months of age.