President Joe Biden will announce a purchase of another 500 million doses of the Pfizer-BioNTech vaccine to be shared with poorer countries dealing with severe COVID-19 outbreaks and a shortage of shots.

Biden will make the announcement this week during his trip to the United Kingdom for the G-7 summit, according to the Washington Post. He did not go into details Wednesday on his way to Britain but told reporters that he would be announcing a new global vaccination strategy.

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