Well, NPR is an American organization, so it's not really surprising that they're writing it with an eye towards their primary demographic (Americans, and to a lesser extent, Europeans) .
> Are other African countries somehow doomed?
It would certainly be interesting to look at the likelihood of propagation in Africa, and hopefully someone does that. But I'd be surprised to see that from a news organization with a primarily American audience. Also, I didn't see anything in the article implying anything about further spread in Africa.
That last question was merely sarcastic and based on my understanding of the article; discussing potential spread to the US/Europe suggests that the virus has already spread in Africa, at least that's how I saw it.
> Are other African countries somehow doomed?
It would certainly be interesting to look at the likelihood of propagation in Africa, and hopefully someone does that. But I'd be surprised to see that from a news organization with a primarily American audience. Also, I didn't see anything in the article implying anything about further spread in Africa.