View clinical trials related to Influenza.
Filter by:Since influenza vaccines are normally administered every year because of the frequent change in their antigenic composition, the safety and immunogenicity profiles of the adjuvanted influenza vaccine need to be re-evaluated after repeated vaccine administration. In this study, subjects enrolled in a previous study will receive a booster dose with the 2006-2007 season's formulations of Fluarix or the adjuvanted vaccine.
This is a sequential phase I and II, controlled, double-blinded study to determine whether immune responses suggesting protection against influenza can safely be induced in young children by two reduced doses one month apart of 0.1 mL of a trivalent inactivated influenza vaccine (INF) administered by the intradermal (ID) route with an investigational ID spacer on a United States (U.S.)-licensed needle-free jet injector (JI), compared to two standard intramuscular (IM) 0.25 mL doses by needle-syringe (N-S) in this age group. The locale is a developing country where financial restraints for the use of full-dose influenza vaccine would limit protection from an influenza pandemic threat, where N-Ss pose dangers and drawbacks in clinical use, and where Mantoux-type N-S ID injections are difficult to administer during mass campaigns.
Since influenza vaccines are normally administered every year because of the frequent change in their antigenic composition, the safety and immunogenicity profile of adjuvanted influenza vaccine need to be re-evaluated after repeated vaccine administration. In this study, subjects previously vaccinated with Fluarix or the influenza adjuvanted vaccine, will receive a booster dose with the 2006-2007 season's formulations of either Fluarix or the adjuvanted vaccine.
The purpose of this study is to evaluate the immunogenicity and the safety of a second vaccination with candidate vaccine compared to Fluarix™ administered intramuscularly in elderly aged 60 years and above
The purpose of this study is to look at changes that occur in blood and nasal swab samples after a person's immune system responds to receiving a flu vaccine. The investigators will look at the immune response in 50 healthy volunteers, between 21 and 49 years of age, after they have been vaccinated with 1 dose of a flu vaccine sprayed into the nose. A blood sample and nasal swab of each nostril will be collected from volunteers before they receive the flu vaccination. After receiving the flu vaccine, volunteers will record health changes and daily temperatures on diary cards at home for 21 days. Blood will be drawn and nasal swabs will be collected from each volunteer at each of the 6 study visits. Volunteers will participate in the study for approximately 1 month. This study is being conducted at the Glennan Center for Geriatrics and Gerontology at Eastern Virginia Medical School.
The primary objective of this trial is to demonstrate the equivalence, in terms of immunogenicity, of three different industrial lots of the investigational vaccine thereby supporting consistency of the manufacturing process. Secondary Objectives: Immunogenicity To demonstrate that the investigational vaccine induces an immune response at least as good as the one induced by the reference vaccine, in terms of antibody titers. To assess the immunogenicity of the investigational vaccine using parameters defined in the European Medicines Agency (EMEA) Note for Guidance (CPMP/BWP/214/96). Safety: To demonstrate that the investigational vaccine is at least as well tolerated as the reference vaccine, in terms of defined safety profile. To describe the safety profile after vaccination. Comfort of the vaccination assessment: To assess the pain immediately after the injection using a Verbal Rating Scale. To describe the vaccination comfort after the injection using a -Patient-Reported Outcome questionnaire: the Vaccination Comfort Questionnaire.
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 compare two influenza vaccines (Fluzone and Fluarix) in terms of the immune response elicited and safety with a six month follow-up after first vaccination. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.
This study will determine how best to use a vaccine for generating high levels of antibodies called immune globulins (IVIG) in people, which, in turn, can be collected and used to develop a possible treatment for avian influenza (bird flu). Immune globulins are proteins made by the body that attack the influenza virus. This study will use an experimental bird flu vaccine to stimulate immune globulin production in healthy people. The vaccine is similar to the regular influenza vaccine and has been studied in more than 450 people. This study will use high doses of the vaccine to generate high antibody levels that can be collected for producing the new treatment. Healthy adults between 18 and 60 years of age who weigh at least 110 pounds may be eligible for this study. Candidates are screened with a medical history and physical examination. Participants are given one of three doses of the vaccine, depending on when they enter the study. The first 25 people enrolled receive a dose of 90 micrograms (mcg). If this dose is well tolerated, the next 25 people receive 120 mcg, and if this dose is also well tolerated, the last 25 people receive 180 mcg. Vaccination consists of either two shots (one in the muscle of each arm) or one shot in the buttock on four occasions. Subjects are vaccinated on four occasions, each 4 weeks apart. On the day of each vaccination, subjects provide a blood sample to evaluate blood counts, chemistries, and antibody levels, and to test for HIV, hepatitis B and C, syphilis, and antibody against avian flu. For 7 days after each vaccination, subjects keep a diary card to record any symptoms, such as pain, fever, muscle aches, or others. At the end of the 7 days, they are contacted by study staff to report the symptoms. In addition to the vaccinations, subjects undergo apheresis to collect IVIG once their blood test shows moderately high antibody levels. For this procedure, blood is collected through a needle in an arm vein and flows through a catheter (plastic tube) into a machine that separates the blood cells from the antibodies and protein. The antibodies and protein are collected and the rest of the blood is returned to the body. Subjects are asked to undergo at least three apheresis procedures.
The purpose of this research study is to compare how the body reacts to different strengths of an experimental cell culture-grown whole virus A/H5N1 flu vaccine when given with or without the addition of aluminum hydroxide adjuvant. Researchers will also look at how much antibody is made to the influenza virus hemagglutinin (HA) after subjects receive the H5N1 vaccine. Three hundred healthy adults aged 18-40 years will participate for approximately 9 months, which includes screening. Participants will receive 2 doses of vaccine or placebo injected 28 days apart. Participants will have blood samples taken up to 7 times and have 8 scheduled study visits.