View clinical trials related to Influenza, Human.
Filter by:The primary objective of this study is to evaluate the performance of the MSD® Influenza Test in detecting influenza A and influenza B in subjects presenting with influenza-like-illness (ILI).
This study is designed to describe the immunogenicity of a pandemic A/H1N1 influenza vaccine in healthy adults given a lower vaccine dose and in a similar group given a full dose of the vaccine. The primary objective is to describe describe the immune response of the inactivated, split-virion swine-origin A/H1N1 influenza vaccine without adjuvant.
The influenza A/H1N1v pandemic virus causes severe pneumonia that can lead to acute respiratory distress syndrome and death even in healthy young individuals. The respective roles of viral replication, bacterial infection and immune alterations of the host during such severe influenza H1N1v infection need to be clarified in order to optimize patients care. In this context, we aim to study immune and virological parameters in bronchoalveolar lavage fluid during severe influenza A/H1N1v infection with pulmonary involvement in intensive care unit. Results will be correlated to bacterial or viral pulmonary co-infections and to peripheral blood immune and virological parameters.
Background: - New vaccines against avian influenza, also known as "bird flu," are being developed and require testing to determine if they are safe and effective and whether they have any side effects. Researchers are interested in testing two experimental avian influenza vaccines to see whether they are safe, if there are any side effects from the vaccines, and how the body's immune response differs in response to different vaccination schedules. One vaccine is an inactivated vaccine (made with killed or weakened influenza) and one is a DNA vaccine that allows the body to use vaccine to make an immune system response to a specific part of an avian influenza protein. Objectives: - To determine the safety and potential side effects of two experimental vaccines against avian influenza. - To evaluate whether the time between the two experimental vaccine injections affects the immune response to the vaccine. Eligibility: - Healthy individuals between 18 and 60 years of age. Design: - Participants will be randomly divided (by chance) into six groups to receive two injections of vaccine at different intervals. One group will receive only the inactivated vaccine, while the other groups will receive the DNA vaccine followed by the inactivated vaccine at different intervals (e.g., 4 weeks, 8 weeks, 12 weeks, 16 weeks or 24 weeks later). - Participants will remain at the clinical center for at least 30 minutes after each vaccination. A few days after each injection, participants will contact staff by telephone or have a clinic visit. Participants will also be asked to complete a diary card at home for 5 days to keep track of temperature changes, injection site skin changes, and other effects. - Four weeks after the first injection, participants will return for a clinic visit and to provide blood samples for testing. - Two weeks after the second injection, participants will return for a clinic visit and provide blood samples (collected through apheresis) to provide information on immune response to the vaccine.
The study will be conducted with nasopharyngeal swab specimens collected prospectively from individuals suspected of having an acute respiratory tract infection caused by an Influenza virus. A series of standard viral culture tests validated for routine use in the clinical laboratory, as well as the CDC swine H1N1 test will be used to establish a collection of well characterized specimens. For each specimen four (4) aliquots will be prepared. One aliquot will be tested in real-time using the requisite viral culture reference methods, one aliquot will be used for H1N1 reference testing, one aliquot will be used to extract nucleic acid in real-time, and one aliquot of the UTM will be archived for the purpose of sequencing to confirm Influenza-positive specimens. The extracted nucleic acid and any remaining specimen will be stored at -70°C for later testing by the artus Influenza RG PCR test, or other investigational method(s).
The purpose of this study is explore the antibody and cell mediated immune responses to one injection of Focetria™ pandemic influenza vaccine in healthy adults aged 18-60 years.
The purpose of this phase IIa trial is to evaluate the immunogenicity of a single dose of GHB11L1 administered by liquid nasal spray for vaccination against influenza A (H1N1) virus. This study is also performed to assess safety, tolerability and pharmacokinetics (shedding) of a single dose of GHB11L1 administered by liquid nasal spray.
The identification and characterization of susceptibility loci for H5N1 infection in humans could have profound implications. The detection of host genetic factors may shed light on key pathogenic interactions between H5N1 and human cells, assisting in identifying the viral characteristics determining pandemic potential. In addition, the identification and verification of susceptibility loci would be followed by functional studies which might point the way to new therapeutic and preventive options. The objective of this study is to investigate if host genetic factors are associated with susceptibility to influenza H5N1 illness
This is a Phase 2 randomized, double-blind, placebo-controlled study to evaluate the safety, tolerability and immunogenicity of three dose levels (5µg, 15µg and 45µg HA) of the novel A (H1N1) influenza VLP vaccine as compared with a placebo in healthy adults (18 to 64 years of age).
Annual influenza vaccination is recommended in patients with systemic lupus erythematosus (SLE). However some concerns remain about vaccination and the risk of lupus flare