Clearing up confusion on potential COVID-19 vaccines, testing

A volunteer receives an injection at the Chris Hani Baragwanath hospital in Soweto, Johannesburg, on June 24, 2020, as part of Africa's first participation in a COVID-19 vaccine trial developed at the University of Oxford in Britain in conjunction with the pharmaceutical company AstraZeneca. 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 percent of people from developing the coronavirus in late-stage trials, the team reported Monday Nov. 23, 2020.
Siphiwe Sibeko | AP Photo file
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