Active clinical trials for "Influenza, Human"

The present study aims to evaluate safety and immunogenicity of two doses, administered three weeks apart, and a 6 month booster dose, of two influenza vaccines containing 7.5 micrograms or 15 micrograms of H5N1 influenza antigen, and of a non-adjuvanted influenza vaccine containing 15 micrograms of H5N1 influenza antigen, in adults

The objective of this study is to assess the safety and immunogenicity of 4 different doses of adjuvanted and non-adjuvanted mock-up pandemic influenza vaccine. Subjects will be enrolled sequentially into 3 study cohorts with 4 escalating doses of H5N1 hemagglutininin antigen (3.75 µg adjuvanted, 7.5 µg adjuvanted/non-adjuvanted, 15 µg adjuvanted/non-adjuvanted, 30 µg adjuvanted). Starting with the lowest dose level, subjects will receive 2 vaccinations (21 days apart) at the dose to which they were assigned. Subjects will be monitored for safety and for antibody response to the vaccine. A data safety monitoring board will review and evaluate all the safety data obtained for a dose level before allowing administration of the next (higher) dose.

The purpose of this study is to evaluate safety and immunogenicity of Pediacel® in infants and toddlers when given at 2,3,4 and 12-18 months of age. Primary Objectives: To compare the post-dose 3 immunogenicity of Pediacel® to Infanrix®-IPV+Hib when both are co-administered with Prevenar®. To describe the post-dose 3 pertussis antibody responses. Secondary Objectives: To compare the post-dose 4 immunogenicity of Pediacel® to Infanrix®-IPV+Hib when both are co-administered with Prevenar®. To describe the safety after each vaccination following co-administration with Prevenar®.

The main purpose of this study is to assess the efficacy of early oseltamivir treatment (started within 24 hours of the onset of influenza symptoms) in preventing the development of acute otitis media as a complication of influenza in children aged 1-3 years.

Vaccination against influenza is a high priority for the elderly population who present the highest morbidity and mortality rate. However, due to their weak antibody response an improvement of the immune response to influenza vaccination remains an unmet medical need. The purpose of an investigational influenza vaccine candidate administered by an alternate route is to improve immune responses to the vaccine in the elderly population, which could provide additional reductions in influenza-associated morbidity and mortality in this population. Primary Objective: To demonstrate that the investigational vaccine induces a better immunogenicity than the reference vaccine in terms of seroprotection rate after the first vaccination. Secondary Objectives: Immunogenicity: To describe the antibody persistence induced by both vaccines at 3, 6, and 12 months after the first vaccination in a subset of subjects. To describe the immunogenicity of the investigational vaccine after each vaccination using parameters defined in the European Medicines Agency (EMEA) Note for Guidance (CPMP/BWP/214/96) specific to elderly subjects. Safety: To demonstrate the tolerance of the investigational vaccine after the first vaccination, in terms of pre-defined solicited systemic reactions. To describe the safety profile after each vaccination. To describe the effect of repetitive injections on the safety profile.

The purpose of this study is to investigate the effectiveness, safety, and tolerability of an influenza vaccine. Influenza is a highly infectious disease that occurs throughout the world in the winter months. Infection with an influenza virus is a major public health threat as it has the ability to spread rapidly and affect large numbers of people. Up to 1359 healthy adults ages 18 to less than 65 years old will participate in this study for up to 24 days. Volunteers will receive an injection of either influenza vaccine with thimerosal, vaccine without thimerosal, or placebo with thimerosal. Volunteers will be asked to document information about any health changes for 21 days following vaccination. Volunteers will return to the clinic on days 5 and 21 after vaccination to share this information with study staff. On day 21, volunteers will have a physical examination. Blood samples will be taken prior to vaccination and at Day 21 post-vaccination.

The purpose of this study is to test the immune response caused by investigational Fluarix vaccine in healthy people aged between 18-64 years in the U.S.A. Up to 1050 volunteers at 4 centers will receive Fluarix or Placebo (saline), and their responses will then be compared. Subjects will be placed by age into 2 groups (18 to 49 years old and 50 to 64 years old), then randomly assigned to receive a dose of Fluarix or Placebo by injection into a muscle. There will be 2 phases in this study: (1) the active study phase (2 visits) for all subjects; and (2) the cross-over phase, only for subjects enrolled in the placebo group who accept to receive Fluarix. Blood samples will be obtained in order to measure immune response to the vaccine. On the day of vaccination, volunteers will receive a diary card to record information on symptoms experienced during the next 3 days. Subject participation in either group will be up to 2 months.

This study evaluated the safety and immunogenicity of 3 formulations of Hib-MenCY-TT vaccine and 1 formulation of Hib-MenC-TT vaccine compared to a control group receiving licensed meningococcal serogroup C conjugate vaccine, each administered at 2, 3, and 4 months of age. Antibody persistence and immune responses to booster vaccinations were additionally assessed at 12 to 18 months of age.

The purpose of this study is to evaluate how young children's bodies learn to fight against flu infection and to see how vaccines may help to fight against the flu. This is a Phase 4, single-center, randomized study of the immune responses of 40 children, ages 5-9, given one of two licensed influenza vaccines (either inactivated vaccine given in an arm muscle or live, attenuated vaccine inhaled through the nose). Study procedures will include up to 3 blood samples. Participants will complete a diary to document any side effects experienced following the vaccination. Participants will return to the clinic for a visit on Day 7-9 and again 4-6 weeks following vaccination. Participants that have not been previously vaccinated will receive a 2nd dose of vaccine. A follow up telephone call will occur 8-10 weeks following vaccination. Total study participation will be up to 75 days.

The purposes of this study are: to make sure that there are no serious side effects of an experimental inactivated influenza A/H5N1 vaccine in children; and to see how the body's immune system reacts to the vaccine. To look at the side effects, researchers will follow children closely after vaccination. To look at immune system responses, researchers will test the children's blood before and a number of times after vaccination. Participants will include up to 130 healthy children ages 2-9 years. Participants will be assigned to receive 2, up to 3 doses of vaccine, or placebo (inactive substance). Subjects will receive at least 2 doses of vaccine approximately 28 days apart. If data shows an enhanced immune response from a third vaccination, children will be offered a third dose of the vaccine. Participants will be involved in study related procedures for up to 13 months, including up to 6 study visits, plus a number of telephone calls.