“We would have immunized 100 million people by the first quarter of 2021,” U.S. Operation Warp Speed chief adviser Dr. Moncef Slaoui said in an interview with Fox News Sunday. He said the US hopes to have about 40 million doses of vaccine distributed by the end of December, which would include the just authorized vaccine from Pfizer Inc and one from Moderna Inc expected to get a similar emergency use nod later this week. Another 50 million to 80 million doses will be distributed in January, and the same number in February, Slaoui said. The vaccine requires two shots per person.