President Joe Biden announced the surge in deliveries to states Tuesday afternoon, along with the news that the federal government is purchasing an additional 100 million doses each of the two approved coronavirus vaccines.

With existing purchases, the White House expects to be able to deliver enough of the two-dose regimens to states to vaccinate 200 million people.

“It is going to take months until we can get the majority of Americans vaccinated,” said Biden, who urged people to wear masks in the meantime to prevent the spread of the virus.

The US has recorded the highest number of confirmed COVID-19 cases in the world at more than 25.4 million, according to Johns Hopkins University data. More than 424,000 coronavirus-related deaths have also been reported across the country.

We will get this virus under control. pic.twitter.com/59iC1nyR0N

– President Biden (@POTUS) January 22, 2021

President Biden, who took office last week, is in a race to contain the virus as faster-spreading variants threaten to increase the death toll across the United States, which has already been hard-hit.

As of Jan. 26,  the Centers for Disease Control and Prevention reported that 23.5 million doses were administered and more than 3.4 million were people fully vaccinated. The world has now surpassed 100 million confirmed cases of the coronavirus.