As for the efficacy of masks and covid, probably the best study done, was in S. Korea. They took actual covid patients and tested them coughing, with a mask, and without, over petri dishes. The masks didn't work.
As I said in an earlier post, it is one thing to test a mask's ability to filter particulants in a controlled environment with a steady stream blowing matter into a mask, it's another when you add the dynamics of the human respiratory system. Covid patients transmitted the virus through the masks.
As I said in an earlier post, it is one thing to test a mask's ability to filter particulants in a controlled environment with a steady stream blowing matter into a mask, it's another when you add the dynamics of the human respiratory system. Covid patients transmitted the virus through the masks.
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