Surplus vaccines at risk of expiring

In Tennessee and North Carolina, demand for the COVID-19 vaccine has slowed down so much that the states have given millions of doses back to the federal government, even though less than half of their total populations are vaccinated. The United States is being confronted with an ever-growing surplus of coronavirus vaccine, looming expiration dates and stubbornly lagging demand at a time when the developing world is clamouring for doses to stem a rise in infections. Million-dollar prizes, free beer and marijuana, raffled-off hunting rifles and countless other giveaways around the country have failed to significantly move the needle on vaccine hesitancy, raising the spectre of new outbreaks.