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Pfizer and Moderna have discovered effective vaccines, but some of us will get the shot before others.

We can see the light at the end of the pandemic tunnel: Pfizer and Moderna have discovered highly effective Covid-19 vaccines, and the former is already requesting an emergency use authorization so it can start vaccinating high-risk Americans next month.

It’s great news, but there’s a problem. For a while, there won’t be enough of any vaccine for all the people around the globe who want to get it. So who should get access to the first doses?

One way to answer that question is to say: The nations that discover a vaccine — or that can pay those who discover it — get first dibs. All the other nations just have to wait until more doses can be manufactured.

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