200720-coronavirus-vaccine-jm-1323_5dd467b3d8783fa427d391f9d9abae0f.jpg

  • July 20, 2020
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FILE PHOTO: A employee is seen at the Reference Center for Special Immunobiologicals (CRIE) of the Federal University of Sao Paulo (Unifesp) where the trials of the Oxford/AstraZeneca coronavirus vaccine are conducted, in Sao Paulo, Brazil, June 24, 2020. REUTERS/Amanda Perobelli/File Photo

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