South African health authorities say a surge in coronavirus cases may be over after its infections rate fell in recent weeks, helping to bring down the numbers across the continent.The country, which accounts for more than half of the cases in Africa, has seen its number of daily infections fall from a peak of 13,000 last month to less than 2,000 this week.As of Monday, South Africa had recorded a total of 611,450 infections and 13,159 deaths. Across the continent, just over 1.1 million cases…