Covid-19: South Africa pauses use of Oxford vaccine after study casts doubt on efficacy against variant

Covid-19: South Africa pauses use of Oxford vaccine after study casts doubt on efficacy against variant Elisabeth MahaseRollout of the Oxford-AstraZeneca covid-19 vaccine in South Africa has been paused after a study in 2000 healthy and young volunteers reported that it did not protect against mild and moderate disease caused by the new variant (501Y.V2) that emerged there.