President Biden announced Tuesday that his administration intends to order an additional 100 million doses of both the Moderna and Pfizer-BioNTech COVID-19 vaccines. The extra 200 million doses, which Biden said should arrive by the summer, would boost the country's supply by about 50 percent to 600 million shots total, meaning that there would be enough shots available to inoculate 300 million people in the coming months without the Food and Drug Administration granting approval for any other vaccine candidates.
It's another sign that the government is raising expectations for the vaccine rollout. On Monday, Biden upped the daily vaccination goal from 1 million to 1.5 million throughout his first 100 days in office and suggested that any American who wants a shot could be able to get one by the spring.
FiveThirtyEight's Nate Silver applauded the administration for getting more ambitious, though he noted it could be difficult — impossible, even, unless the shots are approved for children — to find 300 million willing Americans to get vaccinated by the end of summer. Tim O'Donnell