Flu refers to illnesses caused by a number of different influenza viruses. Flu can cause a range of symptoms and effects, from mild to lethal.
A flu pandemic occurs when a new influenza A virus emerges for which there is little or no immunity in the human population, the virus causes serious illness and spreads easily from person-to-person worldwide.
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Texasflu.org provides the most recent Texas flu information in one convenient location.