One of the first South African Oxford vaccine trialists looks on as a medical worker injects him with the clinical trial for a potential vaccine against the COVID-19 coronavirus at the Baragwanath hospital in Soweto, South Africa, on June 24 ,2020. (Photo by SIPHIWE SIBEKO / POOL / AFP) (Photo by SIPHIWE SIBEKO/POOL/AFP via Getty Images)

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