8 June 2021 - States, hospitals try to reroute such vaccines, while efforts to export them face hurdles.

The prospect of so many doses going to waste in the U.S. when developing nations are desperate for shots would add pressure on the Biden administration to share stockpiled vaccines. 

But there are few practical solutions to administering them quickly in the U.S. or distributing them in time to foreign countries, according to those involved in the vaccination drive.

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