New data about the coronavirus’s viability and research on how respiratory droplets travel prompt some scientists to question current public-health guidelines
So far, the consensus has been that the virus that causes the disease Covid-19 is mostly transmitted through large droplets that are created when people cough, sneeze or talk.
That consensus is the foundation for the Centers for Disease Control and Prevention’s recommendation that people wear cloth face masks and stay least 6 feet apart, as well as the World Health Organization’s...
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