Active clinical trials for "Influenza, Human"

To evaluate the antibody response to each influenza vaccine antigen when administering a single dose to subjects aged 65 years and over

Avian influenza (AI), or bird flu, has recently become a major health concern in Asia and other parts of the world. The purpose of this study is to test the safety of and immune response to a new AI vaccine in healthy adults. Study hypothesis: Influenza A viruses are widely distributed in nature and infect a wide variety of birds and mammals. The direct transmission of avian influenza viruses from birds to humans has recently become a major health concern in Asia and other parts of the world, raising concern of a possible influenza pandemic in humans. This vaccine will evaluate the safety, infectivity and immunogenicity of Live Influenza A vaccine H9N2 (6-2) AA ca reassortant (A/chicken/Hong Kong/G9/97 x A/Ann Arbor/6/60 ca), a cold-adapted, live attenuated virus vaccine administered intranasally for the protection of humans against pandemic influenza viruses of the H9N2 subtype.

The primary objective of this study is to estimate the relative efficacy and assess the safety of CAIV-T compared to TIV.

The purpose of this study is to clarify the preventive effects of catechin gargling on the influenza infection.

Study of the safety and immunogenicity (antibody producing capability) comparing inactivated influenza vaccine to placebo given to infants at 2 and 3 months of age. Infants will receive inactivated influenza vaccine at the same time as other vaccines on the routine immunization schedule. Infants will be randomized at enrollment to receive inactivated influenza vaccine or placebo at a 2:1 ratio. This study is double-blind, randomized, and placebo-controlled.

The primary purpose of this study is to demonstrate the efficacy of an investigational Vero-cell derived influenza vaccine to prevent infection in an adult population with an influenza virus that is antigenically similar to one of the three strains in the vaccine. All subjects will be randomized to receive a single 0.5 ml intramuscular injection from one of three lots of seasonal Vero-cell derived influenza vaccine or saline placebo. Subjects will be monitored for 180 days following vaccination for occurrence of adverse events. For determining antibody response, subjects will have one blood draw before and one blood draw 21 days after vaccination.

This is an open, randomized, multicenter clinical trial. Objectives: To describe the safety profiles during the 21 days following each primary and booster injection. To describe the immune response 21 days after each primary and booster injection of each formulation. To describe the antibody persistence after the first vaccination

As a result of the safety and immunogenicity data generated from earlier dose-ranging studies, the present formulation has been selected for further development in the elderly. Primary Objective: To compare the immunogenicity in subjects receiving investigational Fluzone with those of subjects receiving standard Fluzone®. Secondary Objectives: Immunogenicity: To describe the immunogenicity in subjects receiving investigational Fluzone and standard Fluzone®. Safety: To evaluate and describe the safety profile of investigational Fluzone in terms of solicited- and unsolicited adverse events and serious adverse events post-vaccination.

Due to antigenic changes of influenza viruses, the virus strains used in influenza vaccines are adjusted every year according to WHO (World Health Organization) and CHMP (Committee for Medicinal Products for Human Use) recommendations. Immunogenicity and tolerability of the newly composed vaccines are subject for evaluation in a yearly clinical trial in non-elderly and elderly subjects (CPMP/BWP/214/96).

The purpose of this study is to evaluate the immunogenicity and the safety of candidate vaccines compared to Fluarix™ administered intramuscularly in subjects aged 18-59 years