Vaccinations against COVID-19 in the U.S. will "hopefully” start in less than three weeks, according to the head of the federal government’s program to accelerate a vaccine.

"On the 11th or on the 12th of December, hopefully the first people will be immunized across the United States, across all states, in all the areas where the state departments of health will have told us where to deliver the vaccines,” Moncef Slaoui, head of the government’s Operation Warp Speed, said on CNN’s "State of the Union” on Sunday.

Current plans envisage another milestone around May: a 70% immunization fate across the U.S., which "would allow for true herd immunity to take place,” said Slaoui, a former head of GlaxoSmithKline’s vaccines operation. "Most people need to be immunized before we can go back to a normal life.”