Three days before Thanksgiving, a planeload of passengers from South Africa touched down in San Francisco. One of them was a woman who was in the early stages of a Covid-19 infection, though she wouldn’t know it for almost…
Three days before Thanksgiving, a planeload of passengers from South Africa touched down in San Francisco. One of them was a woman who was in the early stages of a Covid-19 infection, though she wouldn’t know it for almost…