Active clinical trials for "Influenza, Human"

This prospective annual release study is designed to evaluate the safety of 3 new influenza virus vaccine strains to be included in FluMist Quadrivalent for the 2015-2016 influenza season

The main purpose of the this study is to evaluate the safety and tolerability of Immunose™ FLU based on Endocine™ and quadrivalent influenza antigen.

This Phase 2/3 study assessed whether a single dose of seasonal trivalent inactivated split virion influenza vaccine (IVACFLU-S) is safe and well-tolerated in adults 18 to 60 years of age; and whether it will induce immune responses to each of the 3 vaccine antigens to meet 1 or both age group-specific Vietnam Ministry of Health (MOH) licensure requirements.

TROPICS1 is a randomized, observer-blind, active comparator-controlled, single-center, Phase IV trial in 200 participants aged ≥65 years. The control group will receive a standard dose licensed trivalent inactivated influenza vaccine at day 1, and an active-comparator (Tetanus-diphtheria-pertussis vaccine) at day 180. Participants in the experimental group will receive the same influenza vaccine at day 1 and day 180. Endpoints are immunological, and include measures of haemagglutination-inhibition (HI) titres, micro-neutralisation titres and cell-mediated immunity at 4 time points after the initial vaccination up to Day 360. The primary hypothesis is that participants receiving an influenza booster at day 180 will achieve superior influenza seroprotection (HI titre ≥1:40) at day 208, compared to controls. The World Health Organization (WHO) estimates the global annual burden from seasonal influenza as 1 billion infections, with 3-5 million severe cases and 300,000-500,000 deaths. The pattern and impact of these infections varies considerably with climate. In temperate countries, influenza epidemics characteristically occur during the cold winter months, while in sub-tropical countries, they coincide with the rainy seasons. Closer to the equator, influenza virus activity is more complex. In Singapore, biannual epidemics are usual, but with continuous transmission year-round. Bi-annual epidemics, tri-annual epidemics and year round virus activity have also been described in other tropical countries, from Indonesia and Malaysia to Peru and Mexico. There is no published data reporting year-round influenza vaccine effectiveness in the elderly from countries with continuous influenza virus activity. Despite numerous studies worldwide exploring the HI antibody response to influenza vaccination, the majority of these do not continue follow up beyond seroconversion (21-28 days). However, of the few available, HI antibody titres declined following influenza vaccination in the elderly, such that within 6-12 months geometric mean titres approached pre-vaccination levels. With biannual epidemics and year-round transmission in tropical regions, year-round seroprotection may be important to reduce influenza infections in this environment. A six-monthly vaccination cycle would correspond with the decline in vaccine-induced seroprotection in the elderly, and the 6-monthly periodicity of outbreaks in Singapore and other tropical countries.

Influenza infection is related to significant morbidity and mortality in children. The trivalent inactive vaccine (TIV) has been documented to have poor immunogenicity in children and the live attenuated influenza vaccine (ATIV) although proven to have more efficacy is unable to be administered to children under 2 years old. The MF59 adjuvanted influenza vaccine as proven efficacy on reducing the rates of laboratory confirmed influenza, including in children. The study aims to assess early gene transcriptional responses to priming and boosting with MF59-ATIV in children aged 13-24 months and adults aged 18 - 65 years, and to establish correlations with haemagglutination inhibition (HAI) titers. It will be an open label study with 90 healthy children allocated to 3 groups (groups 1, 2 and 3) and 30 healthy adults allocated to group 4.

This is a study to assess the immune (antibody) response and safety of a Seqirus split virion, inactivated Quadrivalent Influenza Vaccine (Seqirus QIV), in comparison with a US licensed 2015/2016 Quadrivalent Influenza Vaccine (comparator QIV) in a healthy pediatric population 5 through 17 years of age.

Safety, Immunogenicity of an Adjuvanted Quadrivalent Subunit Influenza Virus Vaccine Compared to Non-Adjuvanted Comparator Influenza Vaccine in Children Previously vaccinated in Trial V118_05. Subjects will receive either the Same or Alternate Type of Vaccine.

This is a phase I, double-blind, randomized, placebo-controlled trial with two groups of subjects to receive seasonal trivalent inactivated split virion influenza vaccine (A/H1N1; A/H3N2 and B strains) or placebo (phosphate buffered saline). A total of 60 healthy male and female adults 18 through 45 years of age will be randomized to receive vaccine (30) or placebo (30).

This study is a Multicenter, Randomized, Double-Blind, Placebo-Controlled, Phase Ⅲ Trial to evaluate the efficacy, safety and immunogenicity of a single dose of Live-Attenuated influenza Vaccine(LAIV) among healthy children and adolescents aged 3-17 years.

This study is powered to prospectively evaluate the relative effectiveness of adjuvanted trivalent influenza vaccine (aTIV; FLUAD) in preventing influenza mortality, hospitalization, and functional decline in a nursing home population in the U.S., compared to the commercially available, standard dose trivalent seasonal influenza vaccine (TIV; Fluvirin).