Active clinical trials for "Influenza, Human"

The study is aim to evaluate the Immunogenicity with two groups of participants who will received a seasonal trivalent split, inactivated influenza vaccine (A/H1N1; A/H3N2 and B) or an active comparator (licensed influenza vaccine).

This is a Phase 3, randomized, observer-blinded study to evaluate the efficacy, safety, tolerability, and immunogenicity of a single dose of a quadrivalent influenza modRNA vaccine compared to licensed inactivated influenza vaccine in healthy adults 18 years of age and older.

This study compares the immunogenity and safety of quadrivalent inactivated influenza vaccines. The experimental group receives the quadrivalent influenza vaccine developed by Sinovac Biotech Co., Ltd and the control group immunized with Vaxigrip Tetra™. The group has 1600 persons from general population 3 years and older. The design is double-blind and randomized. The primary outcome is the immunogenicity against the 4 strains of influenza included in both vaccines.

A phase III clinical trial of the study of quadrivalent influenza vaccine developed by Sinovac Biotech will be conducted in Chinese children aged 6 to 35 months. The trial is an randomized, double-blind and active controlled study. The objective of this study is to evaluate the Immunogenicity and safety of the vaccine.

This Phase 1, randomized, observer-blind, dose-ranging clinical study is evaluating 6 different formulations of MF59-adjuvanted and non-adjuvanted H2N3 influenza vaccine. Approximately 600 healthy adult subjects are to be randomized into 1 of 6 possible treatment groups with 100 subjects per group, stratified by age group (born after or before 1968). Each subject will receive an influenza vaccine injection on Day 1 and Day 22. Subjects will be followed up for approximately 12 months after the second vaccine injection. The primary immunogenicity analysis is based on the Day 1, Day 8, Day 22, Day 29, and Day 43 serology data. The primary safety analysis is based on solicited local and systemic adverse events (AEs) reported within 10 days after each vaccination, unsolicited AEs reported within 3 weeks after each vaccination, and serious AEs (SAEs), medically attended AEs (MAAEs), AEs leading to withdrawal from the study, and AEs of special interest (AESIs) reported throughout the study.

Substudy A: This is a Phase 1 randomized, open-label study to describe the safety and immunogenicity of up to 3 dose- level combinations of modRNA quadrivalent influenza vaccine (qIRV (22/23)) and bivalent BNT162b2 (original/Omi BA.4/BA.5). Participants will receive either: qIRV (22/23)/bivalent BNT162b2 (original/Omi BA.4/BA.5), at 1 of the 3 dose-level combinations qIRV (22/23) at dose level 1, qIRV (22/23) at dose level 2, or bivalent BNT162b2 (original/Omi BA.4/BA.5) at dose level 1 administered concurrently in the opposite arm to commercially licensed quadrivalent influenza vaccine (QIV). Substudy B: This Phase 1/2 study will describe the safety, tolerability, and immunogenicity of quadrivalent influenza vaccine (qIRV)/bivalent BNT162b2 (original/Omi BA.4/BA.5), trivalent influenza vaccine (tIRV)/bivalent BNT162b2 (original/Omi BA.4/BA.5), and bivalent influenza vaccine (bIRV)/bivalent BNT162b2 (original/Omi BA.4/BA.5) when given concurrently with licensed quadrivalent influenza vaccine (QIV).

Study Description: Background: Well-known fact that the number of cardiovascular diseases is on the rise during influenza epidemic. It is conceivable that influenza may precipitate plaque rupture, increase cytokines with central roles in plaque destabilization and trigger the coagulation cascade. A number of studies have shown that the risk of cardiovascular complications (ACS, stroke, CHF decompensation, cardiac arrhythmias) seem to be reduced following influenza vaccination. The Influenza Vaccination After Myocardial Infarction study data published in September 2021 have demonstrated a significant decrease of mortality (by 40%) during 1 year of follow-up in patients with myocardial infarction (MI) who has been vaccinated during the first 72 hours. Objective: the objective is to find out whether influenza vaccination protects against cardiovascular events and death in ACS & CHF patients vaccinated during hospitalization Methods: Population: 400 patients aged 65 and older with acute coronary syndrome are randomized 1:1 and followed up via telephone calls and registries (AIS "Mortality"). Patients will be included in the study in cardiology departments № 1, 2, 3, 5, 6 of the State Budgetary Healthcare Institution "Samara Regional Clinical Cardiology Dispensary named after V.P. Polyakov" Intervention: Influenza vaccination. Control: group of unvaccinated patients. Planned study period is 1 year.

This is a Phase 1, first-in-human, randomized, placebo-controlled, observer blind study. The effect of one or two doses of an investigational vaccine on safety, reactogenicity, kinetics and magnitude of the post-vaccination antibody response will be evaluated at different timepoints as compared to placebo in healthy adults. Approximately 128 evaluable subjects will be enrolled in this study; n=96 receiving investigational vaccine and n=32 receiving placebo. The study has a screening period (Day -28 to Day -1), a treatment period (Day 1 to Day 43) and a follow-up period (Day 44 to Day 202).

The purpose of this study is to assess the safety and immunogenicity of different formulations of monovalent Influenza A/Astrakhan/3212/2020-like virus vaccine with AS03 adjuvant system in adults greater than or equal to (>=)18 years of age.

Background: Influenza (flu) virus causes 3 to 5 million cases of severe illness and up to 650,000 deaths per year worldwide. Current vaccines work well against single strains of flu virus. But no single vaccine works well against all flu viruses that can cause illness. Objective: To test an experimental flu vaccine (FluMos-v2) in healthy adults. Eligibility: Healthy adults aged 18 to 50 years. Design: Participants will have 11 clinic visits in 10 months. They must agree not to get a licensed flu vaccine while taking part in this study. FluMos-v2 will be given with a needle injected into a muscle in the upper arm. Participants will receive a follow-up phone call the following day. Participants will be given a diary card, a ruler, and a thermometer. They will take their temperature every day for 7 days after receiving the shot. They will measure any skin changes at the injection site. They will record their findings and how they feel. Participants will receive a second FluMos-v2 shot after 4 months. They will repeat the other follow-up steps. Participants will have 9 other clinic visits. Blood will be drawn at each visit. Participants should also come to the clinic if they develop flu-like symptoms during the study. Participants may opt for an apheresis 2 weeks after each shot: Blood will be removed through a needle in the vein of 1 arm. The blood will run through a machine that separates out the white blood cells. The remaining blood is returned through a needle in the other arm....