France joined the United States on Thursday in supporting an easing of patent protections on COVID-19 vaccines that could help poorer countries get more doses and speed the end of the pandemic. While the backing from two countries with major drugmakers is important, many obstacles remain.

The United States’ support for waiving the protections marked a dramatic shift in its position. Still, even just one country voting against such a waiver would be enough to block efforts at the World Trade

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