As a growing number of coronavirus vaccines advance through clinical trials, rich countries such as U.S., Britain, Canada and others are hedging their bets, reserving doses that far outnumber their populations, while many poorer nations struggle to secure enough.
These wealthy countries are fueling an extraordinary gap in access around the world, laying claim to more than half the doses that could come on the market by the end of next year. While many poor nations may be able to vaccinate at most 20 percent of their populations in 2021, some of the world’s richest countries have reserved enough doses to immunize their own multiple times over.
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