– The infестion R-naught. If a positive-tested person is locked in a room with 20 other people for 1 week, touching their faces, hugging and talking to all, will all of them get infected?
Depends on the method of transmission. If you locked yourself in a room with an HIV positive person and did all that, your chances are pretty low unless you decide to swap body fluids.
Do the same with a flu patient and one sneeze or cough could do it
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