Influenza Clinical Trial
Official title:
Do Some Healthy Adults Consistently Have Systemic Reactions to Trivalent Inactivated Split Virus Influenza Vaccines?
This study will recruit 35 healthcare workers who had systemic reactions to influenza vaccine the last 2 times they were vaccinated, to ask whether influenza vaccine is indeed associated with systemic reactions in these workers.
Randomized controlled trials of split virus vaccines in healthy adults have not been able to detect an increase in systemic adverse events compared to control vaccination. These trials do identify a non-trivial risk of systemic symptoms occurring in the week after both placebo and vaccine. There is a small population of healthcare workers who report consistent systemic symptoms after split virus vaccination which may occur because a small group of healthy adults have true physical reactions to components of the vaccine or excipients. If this is true, then alternatives - such as the use of subunit vaccines or live attenuated nasal spray vaccines - might be expected to be better tolerated by these people. ;
Allocation: Randomized, Endpoint Classification: Safety Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Prevention
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