WASHINGTON — The U.S. government has made deals to procure 100 million doses of Pfizer's coronavirus vaccine for US$1.95 billion and 100 million of Moderna's for US$1.5 billion, with options to buy more, as part of the Trump administration's Operation Warp Speed.

According to a Reuters analysis, up to 40 million doses of coronavirus vaccines are expected to be available in the U.S. by the end of 2020. Doses will be allocated by the federal government based on state populations, and the states must follow general guidance from the CDC's Interim Playbook for COVID-19 when implementing their vaccine plans.

This animation explains how the U.S. plans to roll out vaccinations for COVID-19.