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Influenza, more commonly known as flu, is an infectious disease caused by viruses of the Orthomyxoviridae family. Though often confused with common cold due to similar symptoms, influenza is a far more serious, causing up to half a million deaths world wide each year, mainly in the high risk groups the young and the elderly. Learn more about the ever evolving disease, its types, symptoms, and preventive measures that can be taken against it in this book.

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