President Trump announced the creation of Operation Warp Speed in May to fast-track a coronavirus vaccine. He called it "a massive scientific and industrial, logistic endeavor unlike anything our country has seen since the Manhattan Project." Drew Angerer/Getty Images hide caption
Refrigerators store Pfizer's COVID-19 vaccine at a company facility in Kalamazoo, Mich. Jerica Pitts/AP hide caption
Novavax released its federal contract to develop and supply a COVID-19 vaccine. The agreement reveals terms that weren't previously known. Bloomberg via Getty Images hide caption
The Department of Health and Human Services on Saturday made public several contracts with companies working on COVID-19 vaccines as part of Operation Warp Speed. Mark Wilson/Getty Images hide caption
A heavily redacted supply contract between the federal government and vaccine developer Moderna, headquartered in Cambridge, Mass., was released Friday. Joseph Prezioso/AFP via Getty Images hide caption
A volunteer received an injection as part of a clinical trial for a COVID-19 vaccine at Research Centers of America in Hollywood, Fla. Studies of vaccines backed by Operation Warp Speed have enrolled tens of thousands of people in a matter of months. Bloomberg/Bloomberg via Getty Images hide caption