South Africa has put its roll-out of the Oxford-AstraZeneca vaccine on hold after a study showed "disappointing" results against its new Covid variant. Scientists say the strain accounts for 90% of new Covid cases in South Africa. The study, involving around 2,000 people, found the vaccine offered "minimal protection" against mild and moderate cases of Covid-19. South Africa has received 1m doses of the AstraZeneca jab and was due to start vaccinating people next week. Speaking at an online news conference on Sunday, South African Health Minister Zweli Mkhize said his government would wait for further advice on how best...
