(Source: Brandywine Hospital) What You Should Know About the Flu What is influenza? Influenza, or the flu, is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness. Serious cases can result in hospitalization or death. What is a flu shot? Just like other vaccinations, the flu shot is made from a killed virus. When this virus is injected (flu shot) or inhaled (nasal-spray flu vaccine), your body's immune system recognizes...
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