It is yet another mystery surrounding coronavirus disease numbers. South Africa, the S of the expanded BRICS grouping — C, China was where it all began, R, Russia is at #4 in terms of cases, I, India, is at #3, and B, Brazil is at #2 — is the fifth in the world in terms of number of Covid-19 cases. It has seen close to 600,000; yet, the next country from the African continent on the list is Egypt, at #29. Then comes Nigeria at #49. Then starting with Morocco at #52, come another 16 countries within the top 100. Egypt has seen fewer than 100,000 cases; Nigeria, a little less…