Protection From 4th Dose of COVID Vaccine Wanes Completely Within Months: Study

Protection From 4th Dose of COVID Vaccine Wanes Completely Within Months: Study
An Israeli nurse receives a fourth dose of the Pfizer-BioNTech COVID-19 vaccine at the Sheba Medical Center in Ramat Gan near Tel Aviv, on Dec. 27, 2021. Jack Guez/AFP via Getty Images
Lia Onely
Updated:
0:00

An Israeli study found that antibody levels after a fourth dose of the Pfizer BioNTech COVID-19 vaccine returned to similar levels as after the 3rd dose after about four months.

The study, conducted among health care workers at the Sheba Medical Center, the largest hospital in Israel, found that the immunological protection of the 4th dose “was much smaller and had waned completely by 13 weeks after vaccination.”