covid-19September 15, 2020 Crowded parties and coronavirus concerns keep high schoolers from returning to the classroom Overcrowded parties have forced several high schools to go back to online learning in hopes of staving off Covid-19 outbreaks. 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…