Johnson & Johnson’s Covid vaccine was supposed to be one of Africa’s most important weapons against the coronavirus.The New Jersey-based company agreed to sell enough of its inexpensive single-shot vaccine to eventually inoculate a third of the continent’s residents. And the vaccine would be produced in part by a South African manufacturer, raising hopes that those doses would quickly go to Africans.That has not happened.South Africa is still waiting to receive the overwhelming majority of the 31 million vaccine doses it ordered from Johnson & Johnson. It has administered only about two million Johnson & Johnson shots. That …
