Active clinical trials for "Influenza, Human"

This randomized, controlled, double-blinded, dose-ranging, Phase I-II study in 600 healthy adults, 18 to 49 years old, is designed to investigate the safety, reactogenicity, and dose-related immunogenicity of an investigational inactivated influenza A/H5N1 virus vaccine when given alone or combined with aluminum hydroxide. A secondary goal is to guide selection of vaccine dosage levels for expanded Phase II trials based on reactogenicity and immunogenicity profiles. This dose optimization will be applied to both younger and older subject populations in subsequent studies. Subjects who meet the entry criteria for the study will be enrolled at one of 4 study sites and will be randomized into one of 8 groups to receive 2 doses of influenza A/H5N1 vaccine containing 3.75, 7.5, 15, or 45 mcg of HA with or without aluminum hydroxide adjuvant by intramuscular injection. Participants may be involved in study related procedures for up to 8 months.

All marketed influenza vaccines are injected by the intramuscular route. This study will test whether an influenza vaccine is effective when injected by other route than into the muscle. In order to prove this, the amount of antibodies in the blood will be measured before and after vaccination. In addition, the safety of both influenza vaccines will be tested by evaluating all serious reactions occurring after vaccination. The vaccine injected in this study is similar to the sponsor's marketed intramuscular influenza vaccine (Vaxigrip). Primary Objective: To demonstrate and compare the immune response of two dosages of influenza vaccine administered by an alternate route to the intramuscular administration of the vaccine. Secondary Objectives: To compare the immune response 21 days after vaccination between each investigational group versus intramuscular group for each influenza strain. To describe the safety profile after the vaccination in each study group To describe the compliance of the two dosages of the vaccine administered by the alternate route with the European Medicine Agency. Observational Objectives: To describe the safety profile during the 21-day period following an intramuscular revaccination in each group and the possibility of any reaction at the first injection site. To describe the pain at the injection site with a Visual Analog Scale and the acceptability of the injection using a questionnaire in each group. To describe the leakage appearing at the injection site immediately after the alternate route injection and to explore the relationship with immunogenicity. To evaluate the cellular mediated immune response in a subset of subjects.

Pediacel™ is currently licensed in the UK for use as a 3 dose regimen for the active immunisation of infants against Diphtheria, Tetanus, Pertussis, Poliomyelitis and invasive infections caused by Haemophilus influenzae type b. However there are currently no clinical data supporting the use of Pediacel™ using a 3, 5, and 12 months of age vaccination schedule. This study is designed to provide safety and immunogenicity data to support the use of Pediacel™ according to a 3, 5, and 12 months schedule.

The purpose of this study is to compare how the body reacts to different strengths of the new A/H5N1 flu vaccine when given with the addition of aluminum hydroxide adjuvant and provide dosing information. How the body's immune system responds to the new H5N1vaccine with aluminum hydroxide approximately 1 month following receipt of 2 doses of vaccine will also be evaluated. The vaccine is given as an injection or shot in the arm. Volunteer participants in this study will be 600 healthy elderly adults, aged 65 years and older. Participants will be randomly assigned to 4 different dosage groups of vaccine, either with or without adjuvant, for a total of 8 different groups. Volunteers will participate in the study for 7 months. Each individual will receive two vaccinations, the second 28 days after the first. In addition to visits for these vaccinations, subjects will return to the clinic for physical evaluations and blood sample collection 6 times during the course of this study.

The objective of this study is to assess the safety and immunogenicity of inactivated influenza vaccine (whole virion, Vero cell derived). Subjects will be randomly assigned to receive a single injection of whole virion, Vero cell derived or egg derived influenza vaccine on Day 0. Subjects will return to the study site for safety evaluation at predetermined intervals for 180 days after vaccination. Subjects will also have blood drawn at predetermined intervals to measure their immunologic response to vaccination.

The World Health Organisation has warned that an influenza pandemic is inevitable. The avian influenza H5N1 virus strain is the leading candidate to cause the next influenza pandemic. This study will test the safety and immunogenicity of a H5N1 Pandemic Influenza Vaccine in healthy adults. The Study will also assess Lot to Lot consistency of the Pandemic Influenza Vaccine.

Today, the leading contender for the next pandemic of influenza is H5N1, a strain of avian virus. Prevention and control 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 above 18 years the reactogenicity and immunogenicity of one and two administrations of a candidate pandemic H5N1 vaccine formulated from Split Virus.

The World Health Organisation has warned that an influenza pandemic is inevitable. The avian influenza H5N1 virus strain is one of the leading candidates to cause the next influenza pandemic. The elderly are likely to be a special target group for vaccination; therefore, this study will test the safety and immunogenicity of a H5N1 pandemic influenza vaccine in a healthy elderly population.

The study is designed to demonstrate a meaningful difference in immunogenicity between the candidate adjuvanted vaccine compared to the licensed Fluarix vaccine in subjects aged 50 years and above. A control group in younger adults aged 18 to 40 years was included.

The purpose of this study is to evaluate how well the vaccine is tolerated at sites where administrations are given and any effects it may have on subjects' wellbeing. The study will also test the ability of vaccine to cause particular immune responses in the body.