“It’s a good sign for how durable our immunity is from this vaccine,” Ellebedy said.
The CDC explains that mRNA vaccines trigger an immune response by teaching cells how to create a protein.
According to the new study, the mRNA vaccines may not require boosters unless the virus evolves dramatically.
Anyone who recovered from COVID-19 and was also vaccinated may never need boosters even if the virus transforms significantly.
“This kind of careful time-course analysis in humans is very difficult to do,” Iwasaki said.
