Afrikassa rokotetta menee aika huonosti

"What we found is that a lot of countries have received doses, but haven't administered them yet, or haven't administered a significant proportion of them yet," says Janoch.

For instance, 24 countries, almost all in Africa, report using less than a third of their vaccines to date. Of those, 15 report using less than a fourth.

Officials and aid groups involved in vaccine deployment in these countries point to two main reasons: There hasn't been enough international help to cover the logistical costs of vaccination. And there's been a surge in distrust in the wake of recent news about extremely rare but potentially deadly side effects from some of the vaccines available to the continent.