FILE – In this Saturday, July 18, 2020 file photo a general view of AstraZeneca offices and the corporate logo in Cambridge, 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.(AP Photo/Alastair Grant, File)