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From DrDan Johnson -- a clear essay on how Covid-19 is spread
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May 12th 20, 01:07 PM posted to rec.aviation.soaring
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From DrDan Johnson -- a clear essay on how Covid-19 is spread
The effects of heat, humidity and Ultraviolet light
That might work in the president's mind, but for the rest of us, perhaps just simple dilution from fresh air is sufficient.
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