covid-19December 14, 2020 A ‘constant flow’ of vaccine: Pfizer’s Covid-19 shots begin massive rollout Millions of doses of Covid-19 vaccines will be delivered across the country in the coming weeks. 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…