covid-19May 19, 2020 The biologist whose advice went viral tells us what to do next Stop worrying about those runners and cyclists without a mask, whom you scoff at as you walk outside. Worry instead about the loud talkers in crowded indoor spaces. Related posts U.K.'s Johnson launches mass testing…Do you need a Covid-19…What's behind workers' hesitation to…Fully vaccinated people can travel…Younger Latino men are Covid's…Salmonella infections in eight states…Salmonella infections in eight states…The U.S. isn't losing to…Virus-killing robot tested for use…In Covid fight, Cuba touts…