Scientists at Oxford University had begun clinical trials on the coronavirus vaccine on April 23. The first human trial had recruited 510 healthy volunteers aged between 18-55 to test the new vaccine, called ChAdOx1 nCoV-19. This is following the successful test on macaque monkeys in late March. According to the university, in the "best-case scenario", any early sign whether the vaccine works on humans will be known as early as mid-June.
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