January 15, 2021: Joe Biden wants Americans to get 100 million COVID-19 vaccine shots during his presidency’s first 100 days.

Biden conveyed some details on how his administration would achieve the ambitious timeline during a Thursday night speech on his proposed $1.9 trillion economic recovery package. He plans to share more details on Friday about his vaccine plan.

“This will be one of the most challenging operational efforts we’ve ever undertaken as a nation,” Biden said.

Biden added, “We’ll have to move heaven and earth to get more people vaccinated, to create more places for them to get vaccinated, to mobilize more medical teams to get shots in peoples’ arms.”

Biden proposes $20 billion for a national vaccination program.

The plan also calls for hiring 100,000 public health workers in vaccine outreach and contact tracing.

Biden also wants to invest $50 billion to expand testing for coronavirus. The money would be used to purchase rapid tests, expand lab capacity, and aid school and local government testing programs.

Despite much fanfare and hope the vaccines would bring a close to the pandemic, immunization has started slowly. In December, the Food and Drug Administration authorized two vaccines in a two-dose regimen, with the Pfizer-BioNTech doses given 21 days apart and Moderna’s 28 days apart.

30.6 million doses distributed as of Thursday, then 11.1 million have been administered, according to the U.S. Centers for Disease Control and Prevention.

A week ago, Biden’s team announced plans to prioritize the first dose of the COVID-19 vaccine to get as many people vaccinated as possible.