South Africa has scrapped plans to use the Oxford-AstraZeneca COVID-19 vaccine and instead plans to inoculate its front-line healthcare workers with the unapproved Johnson & Johnson jab, the country’s health minister announced on Wednesday. Zweli Mkhize said the vaccinations will begin next week as a study to see what protection it provides from COVID-19, particularly against the variant dominant in South Africa. The J&J vaccines will be used to launch the first phase of the vaccination drive in which the country’s 1.25 million healthcare workers will be inoculated, he said. He said...