I heard a radio piece saying this is false, you can have an infection and still hold your breathe for ten seconds, so don;t rely on this.Experts suggest doing this simple verification every morning: Breathe in deeply and hold your breath for 10 seconds. If this can be done without coughing, without difficulty, this shows that there is no fibrosis in the lungs, indicating the absence of infection. It is recommended to do this control every morning to help detect infection.
And drinking water does not flush the virus from your system.
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