How long does protection from Covid-19 vaccines last ,even Experts don’t know yet because they’re still studying vaccinated people to see when protection might diminish. How efficiently vaccines work against emerging variants will also determine if, when and how often additional shots might be taken.
“We only have information for as long as the vaccines have been studied, We have to study the vaccinated population and start to see, at what point do people become vulnerable again to the virus?” ” said Deborah Fuller, a vaccine researcher at the University of Washington.
Pfizer’s ongoing trial shows the company’s two-dose vaccine remains highly effective for six months, and longer. People who got Moderna’s vaccine also had notable levels of virus-fighting antibodies even after the second shot.