View clinical trials related to Influenza, Human.
Filter by:The focus of this study is to evaluate the safety, reactogenicity and humoral immune responses of the study vaccine when administered at the dose of 7.5 µg HA, 15 µg HA, or 30 µg HA to human subjects.
This study seeks to understand the host factors that affect the replication and immune response of seasonal and candidate pandemic live attenuated influenza vaccine (LAIV) in humans and to develop biomarkers that can predict the viral shedding and immune response to LAIVs.
The investigators hypothesize that people working in an acute care hospital setting will be able to successfully self-administer the intradermal vaccine (Intanza) in less time than nurse-administration of the regular intramuscular influenza vaccine (Vaxigrip). The investigators also hypothesize that people administering the intradermal vaccine for the second time will take less time to successfully administer than people administering it for the first time.
The purpose of this study is to increase childhood influenza vaccination rates using the FDA licensed influenza vaccines according to national guidelines in a randomized cluster trial in which primary care offices are randomized to intervention or control with the control group receiving the intervention in the second year.
Influenza remains a potentially significant and largely preventable source of morbidity and mortality, yet vaccine coverage is low. Young children are at particular risk for underimmunization because they may need to receive 2 doses in a current season. Even among those young children that initiate vaccination, only 40% receive the important second dose, yet one dose does not confer adequate protection. Low-income, urban children may be at particular risk of not receiving two doses. While traditional mail and phone immunization reminders notifying families that a vaccine is due have had limited efficacy in low-income, urban populations, we have demonstrated the success of using text messages. Comparing the effectiveness of different forms of reminders on receipt of this critical second dose of influenza vaccine has not been studied. Besides failure to remember to return for subsequent doses, receipt of 2 doses of influenza vaccine in a season can be affected by limited health literacy regarding influenza vaccination, particularly associated with understanding the need for a second dose since not all children require it. Text messaging offers the ability to combine health literacy promoting information and reminders in a scalable, efficient manner for populations at high risk for underimmunization, limited health literacy, and influenza spread. Therefore, the purpose of this study is to determine whether the provision of interactive vaccine health literacy-promoting information in text message vaccine reminders improves receipt and timeliness of the second dose of influenza vaccine within a season for underserved children in need of two doses.
The purpose of this study is to evaluate the safety, reactogenicity, and immunogenicity of different formulations of a two-dose primary series and booster vaccination of monovalent Influenza H9N2 vaccine manufactured in Quebec, Canada with and without adjuvant, in adults 18 to 64 years of age.
The purpose of this study is to test an investigational vaccine known as "VAX161C." An "investigational" vaccine is one that is not licensed for commercial use in the by the United States (US) by the US Food and Drug Administration (FDA). VAX161C is a vaccine for the influenza A virus subtype H5N1 avian influenza virus (bird flu). In this study, the subject will receive the VAX161C vaccine at one of six doses to see which dose is the best. VaxInnate wants to find out how safe these doses of vaccines are and how well they are tolerated by people who receive them. To measure how effective each type of the vaccine is, VaxInnate will test the ability of the body to develop an immune response, which means how the body recognizes and defends itself against the influenza virus.
The purpose of this study is to determine the safety, tolerability, and immunogenicity in healthy adult subjects of an investigational vaccine being developed for the prevention of pandemic influenza. The vaccine, identified as H5-VLP + GLA-AF, consists of a recombinant influenza virus H5 protein (hemagglutinin from A/Indonesia/5/2005) produced in a plant-based expression system assembling into virus-like particles together with the adjuvant GLA-AF.
The purpose of this study is to evaluate the safety, reactogenicity and immunogenicity of GSK Biologicals' NTHi candidate vaccine in adults, administered for the first time in humans.
The purpose of this study is to observe the adverse reaction ratio and hemagglutination inhibition (HI) antibody positive rate, Geometric mean titer (GMT) of three brands split influenza virus vaccine in different population.