It’s the fourth coronavirus vaccine available in the United States, and it uses a different type of vaccine technology than the other shots.
Earlier in the day, the CDC’s Advisory Committee on Immunization Practices voted 12-0 to recommend the vaccine. Walensky’s signoff was the final step in the process before shots can be given.
“While we know COVID-19 isn’t over, we can manage this moment and continue to minimize COVID-19’s impact on our daily lives.”
Novavax’s vaccine is made using small laboratory-built pieces of the coronavirus to stimulate immunity. Overall, the vaccine relies on recombinant nanoparticle technology and Novavax’s adjuvant, called Matrix-M, to stimulate an immune response and high levels of neutralizing antibodies.
This protein-based approach is a more traditional one for vaccine development than the mRNA vaccines from Pfizer/BioNTech and Moderna.
Protein-based vaccines like Novavax’s work by getting the body’s immune system to recognize little modified pieces of the virus it’s targeting. In this case, that means pieces of the coronavirus spike protein.
Novavax scientists identified the gene for the spike protein and created a modified version of that gene. The researchers cloned the genes into a baculovirus that infects insects. They then infected moth cells — specifically, cells from the fall armyworm — prompting them to produce the coronavirus spike protein. These virus-like nanoparticles were harvested to make Novavax’s vaccine.
“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 the news release. “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.”
As of Monday, about two-thirds of the US population, 67%, is fully vaccinated with at least their initial series of Covid-19 vaccine. But less than a third, 32%, of the population has received a booster dose of vaccine.
CNN’s DJ Judd contributed to this report.
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