FILE – In this Thursday, April 23, 2020 file screen grab taken from video issued by Britain’s Oxford University, showing a person being injected as part of the first human trials in the UK to test a potential coronavirus vaccine, untaken by Oxford University in England. AstraZeneca says late-stage trials of its COVID-19 vaccine were “highly effective’’ in preventing disease. A vaccine developed by AstraZeneca and the University of Oxford prevented 70% of people from developing the coronavirus in late-stage trials, the team reported Monday Nov. 23, 2020. (Oxford University Pool via AP, File)