According to a scientific study by Case Western Reserve University, several individuals’ antibody levels decreased after getting a second shot of the Pfizer vaccine.
The study showed that the antibody levels decreased more than 80% after six months; the results were the same in test subjects with a median age of 76 and test subjects with a median age of 48.
Six months after their second dose, it was reported that the blood of 70% of these nursing home residents had ”very poor ability to neutralize the coronavirus infection in laboratory experiments.”
The test subjects were 120 Ohio nursing home residents and 92 health care workers. The researchers focused on observing humoral immunity, also called antibody-mediated immunity, to measure the body’s defenses against the coronavirus.
The nursing home residents received the Pfizer vaccine as recommended because of its availability on the market, and the elderly were a priority for vaccination.
In the study, the team examined blood samples of 120 Ohio nursing home residents and 92 health care workers.
These findings support the Centers for Disease Control and Prevention’s (CDC) appeal for booster shots because of the loss of immunity, especially among seniors.
According to David Canaday, one of the authors of the study, boosters are even more important as the Delta variant spreads.
He notes the importance of making the information available to the public. ” (…) so we could enter the conversation and the decision-making process for booster vaccine recommendations,” he said.