Nearly a quarter of the nation's existing H1N1 flu vaccines have expired, which means that 40 million doses worth about $260 million are worthless, the Associated Press reported last week. According ...

In Tennessee and North Carolina, demand for the COVID-19 vaccine has slowed down so much that they have given millions of doses back to the federal government, even though less than half of their ...

The U.S. is confronted with an ever-growing surplus of coronavirus vaccine, looming expiration dates and stubbornly lagging demand at a time when the developing world is clamoring for doses to stem a ...

That's now a critical question as the Biden administration prepares to send tens of millions of unused COVID-19 doses abroad to help curb the pandemic. Some state officials have said in recent days ...