Active clinical trials for "Influenza, Human"

Background: Vaccines are substances used to try to create resistance or immunity to a disease and to prevent an infection. Investigators are looking into improved ways to give and test the results of different kinds of vaccines. Researchers are interested in comparing the results of an experimental DNA vaccine for the prevention of seasonal influenza against a standard FDA-approved vaccine for the prevention of seasonal influenza. The experimental DNA vaccine is not yet approved by the FDA for preventing the flu. Objectives: - To test the safety and immune response of an experimental DNA vaccine for seasonal influenza, compared to the standard vaccine for seasonal influenza. Eligibility: - Healthy individuals between ages 45 and 70 who have not yet received the seasonal influenza vaccine. Design: Participants will have six planned clinic visits (Weeks 0, 1, 3, 4, 6, and 27) and two telephone follow-up contacts (within 2 days after each injection) during this study. Participants will be divided into two groups: one group will receive two standard (TIV) flu vaccine injections given using a needle and syringe, while the other will receive the DNA flu vaccine using a needleless injection system followed by the TIV vaccine. The vaccine injections for both groups will be given approximately 3 weeks apart, Clinic staff will observe participants for at least 30 minutes after each vaccination. One to two days after each injection, participants must telephone the clinic staff, and for 7 days after the vaccination participants will keep a diary card to report on possible side effects. During study visits, blood samples will be collected for research purposes to test for responses to vaccine.

This study will evaluate the safety and immunogenicity of different combinations of A/H1N1 2009 (swine flu) vaccine in healthy young children

The purpose of this study is to evaluate the safety of a 2009 H1N1 influenza vaccine in pregnant women and to determine how their body reacts to different strengths of the vaccine. Two strengths of the H1N1 influenza vaccine will be tested. Since it is not known if the response to the vaccine in pregnant women is the same or different than in non-pregnant women, the study also includes a group of women who are not pregnant for comparison. Participants include 200 pregnant women and 100 non-pregnant women ages 18-39. Study procedures include physical exams, several blood samples and maintaining a memory aid to document daily temperature and side effects for 8 days following vaccination. Participants will be involved in study related procedures for about 6 months.

This project is designed to assess the efficacy of immunizing women during pregnancy with influenza vaccine on the health of these women during their pregnancy and for 6 months post-partum as well as on the health of their newborn infants during the first 6 months of life. It will be conducted in Sarlahi District in southern Nepal, a rural area where a number of large scale randomized trials have been conducted over the past 20 years.

UMN-0501 is a purified recombinant influenza HA vaccine (A H5N1/Vietnam/1203/2004). The purpose of the present study is to evaluate immunogenicity, safety and optimal dose among three different doses of UMN-0501 following two same-dose vaccinations of UMN-0501 per patient with a 3 week interval between vaccination in healthy young adults. Immunogenicity will be confirmed by both microneutralization (MN) antibody and hemagglutination inhibition (HAI) titer levels in the serums of subjects after receiving different doses of UMN-0501. There will be three dose groups with 30 subjects per group for a total of 90 healthy young adults aged 20-40 years enrolled in this study.

This is to evaluate immunogenicity based on EMEA/CHMP criteria, and safety & tolerability of cell-derived A/H1N1 influenza HA vaccine in healthy Japanese elderly subjects.

This study aims to evaluate the immunogenicity, by means of cell mediated immunity (CMI) and hemagglutination inhibition (HI) assay, and also the safety of a MF59C.1-adjuvanted subunit influenza vaccine compared with a conventional subunit vaccine in previously unvaccinated children aged 6 to <36 months.

This trial will assess the immunogenicity and safety of GSK Biologicals' vaccine GSK1557484A, prepared from old concentrated monobulk material, in adults aged 18 to 64 years, when administered up to 5 years following production.

The purpose of this study is to evaluate the antibody response to each of the three influenza vaccine strains included in the seasonal flu vaccine(AdimFlu-S), as measured by hemagglutination inhibition (HAI) at 4 weeks after two doses of study vaccine, 4 weeks apart, in infants between 6 and 12 months of age.

The purpose of this study is to evaluate the safety and immunogenicity of GlaxoSmithKline Biologicals' influenza vaccine GSK2186877A in healthy children 6 to 35 months of age. This Protocol Posting has been updated following Amendment 1 of the Protocol, Jun 2010. The impacted sections are study design, outcome measures, intervention sections and number of subjects.