The immediate answer to that is that we need countries that have secured doses of COVID vaccine to be committing to making donations of a certain percentage of the shipments they will be receiving. The world is, quite frankly, facing a massive inequity in access that's in motion today, and there is a global shortage of available supply. The COVAX facility, which is the primary mechanism for many countries to access COVID-19 vaccines, is short 150 million doses this month, and that will increase to 190 million doses next month. Really, in the face of quite limited manufacturing capacity, which has increased but hasn't significantly diversified, the immediate solution we need—and it's a stopgap emergency measure—is for countries to be donating doses to be reallocated to lower-income countries.
On May 28th, 2021. See this statement in context.