Each winter, millions of people suffer from the flu. The flu, short for influenza, is virus that infects the nose, throat and lungs. The flu spreads from person to person especially when an infected person coughs or sneezes Influenza usually is a mild disease in healthy children, young adults and middle-aged people. The flu can be life threatening in older adults. and in people of any age who have chronic illnesses, such as diabetes, or heart, lung or kidney diseases.
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