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when flu spreads
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The Hidden Timeline: Flu When Is It Contagious & How to Stop It
The misconception that flu contagion starts only after fever or coughing begins has led to widespread underestimation of its spread. A 2019 study in The...
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The misconception that flu contagion starts only after fever or coughing begins has led to widespread underestimation of its spread. A 2019 study in The...