![]() They use a snippet of the coronavirus’s genome to instruct the body to produce the spike protein internally, which triggers the development of antibodies. Pfizer-BioNTech's and Moderna's vaccines, by contrast, were the first mRNA vaccines authorized. The FDA has approved several protein-based vaccines in the past, including one for hepatitis B and another for shingles. Novavax’s vaccine stimulates the production of antibodies by introducing the body to a purified spike protein from the coronavirus, along with an immune-boosting ingredient called an adjuvant. Matt McClain / The Washington Post via Getty Images file A person works in a lab at Novavax in Gaithersburg, Md., on May 25, 2022. More than 1 million doses had been administered worldwide as of June 30, Novavax said Tuesday. The vaccine has already been authorized in more than 40 countries and the European Union. Those who are immunocompromised should receive two doses three weeks apart. In a presentation to the advisory panel Tuesday, CDC officials said that people ages 18 and older who are not immunocompromised should get the two doses of Novavax's vaccine three to eight weeks apart. "With Covid-19 cases on the rise again across parts of the country, vaccination is critical to help protect against the complications of severe Covid-19 disease." "If you have been waiting for a Covid-19 vaccine built on a different technology than those previously available, now is the time to join the millions of Americans who have been vaccinated," Walensky said in a statement on Tuesday. still have not received a single Covid vaccine, according to the CDC. vaccination push, since it does not use mRNA technology. Some public health officials hope shot will fill a gap in the U.S.
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