covid-19December 20, 2020 First shipments of Moderna vaccine roll out, a new weapon in U.S. Covid-19 response Following the distribution of the Pfizer vaccine last week, Moderna’s effort means the U.S. now has two vaccines in its arsenal to fight the coronavirus. 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…