Biden administration prepared for vaccine diplomacy as US expects surplus

The Biden administration has signaled its willingness to donate extra vaccines to poorer countries with the promise of a surplus in the United States by the summer.

The federal government has purchased more than enough doses of vaccines that have been authorized by the Food and Drug Administration to immunize all 260 million adults in the U.S. In total, that includes 100 million doses of the single-dose Johnson & Johnson vaccine on top of 300 million doses each of the two-shot Pfizer and Moderna vaccines.