Seasonal Influenza and the Flu Vaccine

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Influenza, also known as the flu, is an infection of the respiratory system that is caused by the influenza virus. Influenza season may begin in October and peaks between late December and March, although this can vary each year. The flu is responsible for many hospitalizations and deaths every year in the United States.



National Jewish Health authors free downloadable patient education materials to provide you and your family the information and tools to help manage your disease. They include Understanding Booklets, Med Facts, Test Facts, Medication handouts and more.