covid-19December 30, 2020 Sports leagues rushed back. Now they’re struggling as Covid runs through the U.S. Most leagues have restarted play even as players have tested positive, games have been delayed and the broader national situation has worsened. 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…