“What the world really needs right now is leadership. That’s what’s been sorely missing since day one of this pandemic,” Ottenhoff continued. “Most countries have been looking inward and haven’t been really cooperating across global borders … and I think the Biden administration is really well positioned to play that role right now.”

Still, the number of doses shared by the U.S. falls far short of the billions of doses needed to vaccinate the rest of the world.

“Whether boosters are administered or not, more doses urgently need to be redistributed and allocated to health care workers and high-risk populations in low- and middle-income countries in order to vaccinate the world and end this pandemic,” Carrie Teicher, program director at Doctors Without Borders USA, said in an emailed statement.