Africa's could be low due to lack of adequate testing/evaluation....or they just really have low cases.
At this point in the game I trust very little "official" sources.
AFAIK, since malaria is so common in Africa, the use of Chloroquine and Ivermectin is also very common. Limited use of expensive, ‘effective’ ‘gene-therapy’ shots by Pfizer and Moderna, so all they have is the ‘ineffective’ 😉 😉 😉 prophylactic of Chloroquine or Ivermectin that works 90% of the time, give or take.