WASHINGTON (AP) — President-elect Joe Biden will release most available COVID-19 vaccine doses to speed delivery to more people, a reversal of the Trump administration policy, his office said Friday.

“The president-elect believes we must accelerate distribution of the vaccine while continuing to ensure the Americans who need it most get it as soon as possible,” spokesman T.J. Ducklo said in a statement. Biden “supports releasing available doses immediately, and believes the government should stop holding back vaccine supply so we can get more shots in Americans’ arms now.”

Under the Trump administration’s approach, the government has been holding back a supply of vaccines to guarantee that people can get a second shot, which provides maximum protection against COVID-19. Both the Pfizer-BioNTech and Moderna vaccines require a second shot about three weeks after the first vaccination. One-shot vaccines are still undergoing testing.

After a glow of hope when the first vaccines were approved last month, the nation’s inoculation campaign has gotten off to a slow start. Of 29.4 million doses distributed, about 5.9 million have been administered, or 27%, according to the Centers for Disease Control and Prevention.

Biden has already indicated his displeasure. In a speech last week, before his election victory was certified by Congress, the president-elect said he intends to speed up vaccinations by having the federal government take a stronger role to make sure that vaccines are not only available, but that shots are going into the arms of more Americans.

“The Trump administration plan to distribute vaccines is falling behind—far behind,” Biden said. “If it continues to move as it is now, it’s going to take years, not months, to vaccinate the American people.”

The American Hospital Association estimates that the nation would need to vaccinate 1.8 million people a day, every day, from Jan. 1 to May 31, to reach the goal of having widespread immunity by the summer. That’s also called “herd immunity” and would involve vaccinating at least 75% of the population.

Without spelling out details, Biden said his administration will put in place a much more aggressive vaccination campaign, with greater federal involvement and leadership, and the goal of administering 100 million shots in the first 100 days.

He said he and Vice-president elect Kamala Harris have been talking with state and local leaders about a coordinated approach that meshes the efforts of governments at all levels. Among the specifics: opening up vaccination centers and sending mobile vaccine units to hard-to-reach communities.

“The top thing is that there’s not a coordinated national plan,” Biden adviser Dr. Rick Bright told The Associated Press.

Ducklo said Biden will share additional details next week on how his administration will engage the pandemic when he takes office on Jan. 20.

Biden’s plan to change the vaccine distribution plan was first reported by CNN.