Lifestyle Health Johnson & Johnson Says Its Single-Dose COVID Vaccine Has Increased Protection with Booster Shot Johnson & Johnson shared data that showed a booster shot given two months and six months after the initial dose increased protection against COVID-19 By Benjamin VanHoose Published on September 21, 2021 09:36 AM Share Tweet Pin Email Photo: JUSTIN TALLIS/AFP via Getty Images A booster shot of the Johnson & Johnson vaccine proved to created increased protection against COVID-19, the company announced Tuesday morning, sharing results from a new study. The new data shows that the single-dose vaccine — one of three options available in the United States, alongside offerings from Pfizer/BioNTech and Moderna — is still "strong and long-lasting protection," Johnson & Johnson said. That protection "increases when a booster shot of the Johnson & Johnson vaccine is administered," and the booster shot was "generally well-tolerated when administered." "It is critical to prioritize protecting as many people as possible against hospitalization and death given the continued spread of COVID-19. A single-shot COVID-19 vaccine that is easy to use, distribute and administer, and that provides strong and long-lasting protection is crucial to vaccinating the global population," Paul Stoffels, vice chairman of the executive committee and chief scientific officer at Johnson & Johnson, said in a statement. "At the same time, we now have generated evidence that a booster shot further increases protection against COVID-19 and is expected to extend the duration of protection significantly," Stoffels added. Pfizer Says Its COVID-19 Vaccine Is 'Safe, Well Tolerated' Among Kids 5 to 11 with Lower Doses Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. According to a press release, a booster shot given at two months provided 94 percent protection against COVID-19, and a booster at six months after the initial dose offered a "12-fold increase in antibodies." The U.S. Food and Drug Administration issued an emergency use authorization for the Johnson & Johnson vaccine on Feb. 27, and it is available in the U.S. for adults 18 and over. According to the FDA, "the most commonly reported side effects were pain at the injection site, headache, fatigue, muscle aches and nausea. Most of these side effects occurred within 1-2 days following vaccination and were mild to moderate in severity and lasted 1-2 days." Pfizer earned FDA approval for its vaccine among people ages 16 and up last month. The vaccine is still under emergency use approval for kids aged 12 to 15 as the FDA continues to fully vet the shot. Moderna, another two-dose option, was given emergency authorization for adults in December. 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.