Scientists at the NIH worked with Moderna to develop its COVID-19 shot.
The United States has delivered over 500 million doses of vaccines to over 100 countries as part of the 1.2 billion doses it pledged at the first summit in September and has already committed over $19 billion in funding for vaccines, tests, treatments, and other forms of assistance, Biden said.
"There is still so much left to do. This pandemic isn't over," said Biden. "Today, we mark a tragic milestone here in the United States, 1 million COVID deaths, 1 million empty chairs around a family dinner table. Each irreplaceable."
(Reporting by Ahmed Aboulenein; Additional reporting by Jennifer Rigby in London, Michael Erman in New York, and Chris Gallagher in Washington; Editing by Leslie Adler and Nick Zieminski)