Published in Medical Letter on the CDC and FDA, April 19th, 1999
It is suspected that some 85 percent of asthma exacerbations may be caused by upper respiratory tract infections with viruses - including influenza.
To see whether influenza vaccination protected children from such exacerbated asthma episodes, CDC researcher Piotr Kramarz and colleagues conducted a historical cohort study using data from the Vaccine Safety Datalink (VSD). For the 1995/1996 influenza season, the researchers evaluated the incidence of hospitalization or emergency room visits in vaccinated...
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