[https://edition.cnn.com/2021/10/06/health/pfizer-vaccine-waning-immunity/index.html](https://edition.cnn.com/2021/10/06/health/pfizer-vaccine-waning-immunity/index.html) >"Two real-world studies published Wednesday confirm that the immune protection offered by two doses of Pfizer's Covid-19 vaccine drops off after two months or so, although protection against severe disease, hospitalization and death remains strong."

"These findings suggest that a large proportion of the vaccinated population could lose its protection against infection in the coming months, perhaps increasing the potential for new epidemic waves," they wrote.