Senator John Cornyn @JohnCornyn
62 days after that, on March 16th, human trials began. Maggie Keenan, a 91-year-old Briton, received the first clinical Pfizer vaccine on December 8th. By comparison, the vaccine against polio in America took 20 years to make the journey from trials to licence. @TheEconomist — PolitiTweet.org