WOIO: David Canaday, professor at the School of Medicine, discussed his study that found a significant decrease in COVID-19 antibodies just six months after those in the study had received the second dose of their Pfizer vaccine.
![Photo showing vials of COVID-19 vaccines lined up](https://thedaily.case.edu/wp-content/uploads/2021/04/vaccine-vials-feat-768x329.jpg)
WOIO: David Canaday, professor at the School of Medicine, discussed his study that found a significant decrease in COVID-19 antibodies just six months after those in the study had received the second dose of their Pfizer vaccine.