The vaccines don’t work for as long as expected. There may be shortages. Waste a jab on an American kid and an African elder may die.
The last I read, many of the sub-Sahara African countries were fairing quite well against CoVid infections/deaths.
Maybe its due to the prevalent use of HCQ and/or Ivermectin, or maybe because those countries have a fairly youthful population.
I tilt towards the use of HCQ and Ivermectin, since other nations that have incorporated Ivermectin use (e.g., Indonesia, and some states in India) have seen their CoVid numbers dramatically drop.