Experts argue that pushing out more COVID-19 vaccine doses to states sooner may be a good idea, even if it means there's a chance some people's second dose gets delayed.
President-elect Biden plans to release almost all available doses of COVID-19 vaccines, stepping away from the Trump administration policy to hold back about half of the supplies for booster shots.
Shots must be administered or discarded within six hours of reaching room temperature. When doses remain, the hunt begins for recipients.
Critics say the vaccine rollout suffers from the same problems that have plagued the response to the pandemic for testing and other responses: lack of aggressive and coordinated federal leadership.