View clinical trials related to Influenza, Human.
Filter by:The purpose of this study is to compare a new higher-dose influenza virus vaccine to the standard dose vaccine in elderly adults who can walk. Current influenza vaccines protect elderly against viral influenza but not as well as desired. It is expected that the higher doses vaccine can be given with little reaction, but this needs to be tested. Up to 410 people ages 65 years and older will be recruited from the community and from existing volunteer populations. Participants will receive either the high or standard dose injected in the muscle, remain in the clinic for 20 minutes afterward, and maintain a daily memory aid for 7 days. The memory aid will be reviewed by telephone 8-12 days after the injection and return to the clinic or contacted by telephone 6 months after the injection.
The purpose of this study is to describe the level of serum antibody conferred by CAIV-T and TIV against homotypic and heterotypic influenza virus strains.
The purpose of this study is to test the immune response caused by investigational Fluarix vaccine in healthy people aged between 18-64 years in the U.S.A. Up to 1050 volunteers at 4 centers will receive Fluarix or Placebo (saline), and their responses will then be compared. Subjects will be placed by age into 2 groups (18 to 49 years old and 50 to 64 years old), then randomly assigned to receive a dose of Fluarix or Placebo by injection into a muscle. There will be 2 phases in this study: (1) the active study phase (2 visits) for all subjects; and (2) the cross-over phase, only for subjects enrolled in the placebo group who accept to receive Fluarix. Blood samples will be obtained in order to measure immune response to the vaccine. On the day of vaccination, volunteers will receive a diary card to record information on symptoms experienced during the next 3 days. Subject participation in either group will be up to 2 months.
The purpose of this study is to compare two flu vaccines to determine their safety and ability to stimulate an immune response in HIV infected children and adolescents. This study will also determine how often and how long people who receive a vaccine are able to spread flu vaccine virus to other people.