Nine things to know about Africa’s first COVID-19 vaccine trial

“South Africa might be taking a small step towards eradicating COVID-19 when the country enrolls its first participant in a COVID-19 vaccine trial — the continent’s first. A vaccine developed by Oxford University will be tested on 2 000 trial volunteers… Wondering why we’re doing a trial in the first place? Or how and when we’ll know if the vaccine being tested has been successful? We answer nine questions you may have.”