Lifestyle Health President Biden to Announce Purchase of Additional 100 Million Doses of Johnson & Johnson COVID Vaccine These additional doses will be delivered in the second half of the year, a senior administration official said By Georgia Slater Georgia Slater Twitter Georgia Slater is a writer/reporter on the Parents team at PEOPLE. She began at the brand in 2018 as an editorial intern and later returned as an intern on the Food team. Upon graduating from the University of Maryland in 2019, Georgia worked as an entertainment intern at USA Today before coming back to PEOPLE as a digital news writer. In April 2021, she began her role as a Parents writer/reporter. People Editorial Guidelines Published on March 10, 2021 12:02 PM Share Tweet Pin Email Johnson & Johnson's COVID-19 vaccine. Photo: Alex Gottschalk/DeFodi Images via Getty President Joe Biden will announce plans Wednesday to purchase an additional 100 million doses of Johnson & Johnson's single-shot COVID-19 vaccine, according to multiple reports. He is expected to share the news during a White House meeting with executives from Johnson & Johnson and Merck, whose partnership was announced last week as a way to speed up vaccine production, according to The Washington Post. These additional doses will be delivered in the second half of the year, a senior administration official told the Post. Johnson & Johnson already has a deal with the United States to provide 100 million doses by the end of June. Last week, nearly 4 million doses of the vaccine were shipped out to vaccination sites across the United States. RELATED: Alaska Becomes First U.S. State to Open COVID-19 Vaccinations to Anyone Age 16 and Older The vaccine from Johnson & Johnson is the third one approved to fight the ongoing COVID-19 pandemic, following the authorization of the Moderna and Pfizer vaccines. It is the first that requires only one shot and can remain stable in a refrigerator for several months. The Johnson & Johnson vaccine was authorized for emergency use by the Food and Drug Administration on Feb. 27. The following day, the Centers for Disease Control and Prevention's Advisory Committee on Immunization Practices voted to recommend the vaccine to adults 18 years and older in the U.S. Johnson & Johnson's COVID-19 vaccine. EMMANUEL CROSET/AFP via Getty Images According to NBC News, the United States already has enough vaccine supply for every adult without the additional Johnson & Johnson doses, as the government made a deal with Pfizer and Moderna for 200 million more doses by the end of July. These additional Johnson & Johnson doses could be used as a backup if Pfizer or Moderna run into production issues. Fully Vaccinated People Can Hang Out Together Unmasked, CDC Says in New Guidelines Earlier this month, Biden announced that the nation will have enough vaccine supply for every American adult by the end of May. During a briefing on the administration's COVID-19 vaccination efforts, Biden said that the nation has made "important progress" on vaccine distribution. Never miss a story — sign up for PEOPLE's free weekly newsletter to get the biggest news of the week delivered to your inbox every Friday. However, that this does not mean that all American adults will actually receive a shot by the end of May. It will likely take extra time to distribute and administer the shots. Currently, there are about 2 million doses of the three coronavirus vaccines being administered each day, according to The New York Times. Though the president said the nation is "moving in the right direction," he urged the public to continue to be vigilant about COVID-19 safety precautions. As information about the coronavirus pandemic rapidly changes, PEOPLE is committed to providing the most recent data in our coverage. Some of the information in this story may have changed after publication. For the latest on COVID-19, readers are encouraged to use online resources from the CDC, WHO and local public health departments. PEOPLE has partnered with GoFundMe to raise money for the COVID-19 Relief Fund, a GoFundMe.org fundraiser to support everything from frontline responders to families in need, as well as organizations helping communities. For more information or to donate, click here.