welcome back. the rate of coronavirus infection in south africa is rapidly escalating. it is forcing officials to take drastic action. world health experts are afraid it might be a sign of things to come for other countries in the region. cnn's david mckenzie explains. >> freshly dug graves in soweto. the death toll in south africa has been low. but covid-19 is getting a second chance. >> the coronavirus storm has arrived as we said it would. >> reporter: coronavirus cases in south africa are surging. 400,000 infections, a number that's been steadily rising