What’s the fairest way to share covid-19 vaccines around the world?

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People queue to receive a vaccine provided through COVAX in Nairobi, Kenya

REUTERS/Monicah Mwangi

THE covid-19 pandemic has entered a dangerous new phase, with new variants spreading widely and overwhelming healthcare systems in some countries, such as India. Vaccines promise to bring an end to the pandemic, but with supplies still severely limited, many believe we need to think more wisely about how best to use the doses we have.

“Our vaccinations should go to those that are most vulnerable, in most urgent need and where they can make the most difference,” says Krishna Udayakumar at Duke University in North Carolina. …

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