Trump had no plan to distribute vaccines -Pelosi

"They didn't even have a plan," the Democratic leader said. "Just another in a series of their terrible, ineffective approach to it, from the start," Pelosi said.

The pandemic has killed more people in the United States than anywhere in the world, and left millions out of work due to lockdowns.

The virus cast a shadow over Biden's inauguration on the steps of the U.S. Capitol on Wednesday. Crowds, which often reach into the hundreds of thousands for the swearing-in of a president, were kept away for fear of spreading infections.

Biden will sign a series of executive orders related to the pandemic later on Thursday, including requiring mask-wearing in airports and on certain public transportation, including many trains, airplanes and intercity buses, officials said.

The administration will also expand vaccine manufacturing and its power to purchase more vaccines by "fully leveraging contract authorities, including the Defense Production Act," according to the plan.