Vaccine Antibodies Decline 7 Months After Second Pfizer Shot: US Study

Vaccine Antibodies Decline 7 Months After Second Pfizer Shot: US Study
Safeway pharmacist Ashley McGee fills a syringe with the Pfizer COVID-19 vaccination in California on Oct. 1, 2021. Justin Sullivan/Getty Images
Updated:

Antibody levels generated by two shots of the Pfizer-BioNTech vaccine can undergo up to a 10-fold decrease seven months following the second vaccination, research suggests.

The drop in antibody levels will compromise the body’s ability to defend itself against COVID-19 if the individual becomes infected.