Nearly a year after diagnosing its first COVID-19 infection, Britain's National Health Service on Tuesday inoculated its first citizens against the coronavirus as it begins its largest vaccine campaign in history. Margaret Keenan, a 90-year-old grandmother, at 6:31 a.m. became the first person in the world to receive the Pfizer/BioNtech COVID-19 vaccine at the University Hospital in Coventry in central England. "I feel so privileged to be the first person ...