DAKAR, Senegal — South Sudan, a nation of 11 million, has more vice presidents (five) than ventilators (four). The Central African Republic has three ventilators for its five million people. In Liberia, which is similar in size, there are six working machines — and one of them sits behind the gates of the United States Embassy.

In all, fewer than 2,000 working ventilators have to serve hundreds of millions of people in public hospitals across 41 African countries, the World Health Organization says, compared with more than 170,000 in the United States.

Ten countries in Africa have none at all.

Glaring disparities like these are just part of the reason people across Africa are steeling themselves for the coronavirus, fearful of outbreaks that could be catastrophic in countries with struggling health systems.

The gaps are so entrenched that many experts are worried about chronic shortages of much more basic supplies needed to slow the spread of the disease and treat the sick on the continent — things like masks, oxygen and, even more fundamentally, soap and water.