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What Is Influenza?

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Influenza (flu) is an infectious respiratory illness caused by influenza viruses. There are two primary types of influenza viruses: type A and B. Both Influenza viruses commonly spread during the flu season. Flu season is unpredictable, but is typically starts in October and ends May. Influenza occurrences are generally at its peak between December and February. Cases recorded of influenza are mild illnesses to life threatening trips to the hospital.

In 1890, the first appearance recorded of a destructive influenza pandemic struck, killing many Americans. Those who survived lived on to experience the 1918 pandemic and tended to be more immune to the disease. By May 1918, reports of severe
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