Biden’s Vaccine-Supply Drive Falls Short of Surging Demand (2)

The Biden administration’s move to boost the supply of Covid-19 vaccines in coming weeks amounts to opening the faucet a little wider: Even with the extra flow, demand for the shots will still swamp supply for months unless the U.S. can open another spigot.

President Joe Biden said Tuesday the U.S. would ship at least 10 million doses for the next three weeks, a 16% increase over the current level. That pace means tens of millions of Americans who are now eligible for the shot -- those 65 and older in many states -- will still have to wait.

Biden...