For the past two years, the same phenomenon has occurred every five to six months. At regular intervals, a new wave of positive cases is pouring into South Africa. In three weeks, the number of people tested positive every day has just risen from 1,200 to 6,500. The increase is very rapid, even if we are still a long way from the previous wave ). December). At the same time, the positivity rate has already reached 25%, up from 6% a month ago and up to 35% in mid-December.