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Also available in: Spanish
Each winter, millions of people suffer from the flu, a highly contagious infection. Flu - the short name for influenza - is caused by viruses that infect the nose, throat, and lungs. A flu shot can gr... Details >
Also available in: Spanish
A checklist of symptoms designed to assist you in determining which of these health problems you may have.... Details >
National Institute of Allergy and Infectious Diseases, National Institutes of Health