From ChildrensHealthDefense.org…
Two studies published Wednesday in the New England Journal of Medicine confirm any immune protection offered by two doses of Pfizer’s COVID vaccine drops off after roughly two months — although protection against severe disease, hospitalization and death remains strong, the authors of the studies said.
A prospective longitudinal study from Israel covering 4,800 healthcare workers showed antibody levels waned rapidly after two doses of vaccine “especially among men, among persons 65 years of age or older and among persons with immunosuppression.”
Antibodies were tested during the baseline period defined as four to 17 days after receipt of a second vaccine dose, and every four weeks thereafter over a six-month period.
The highest titers after receipt of the second vaccine dose were observed during days four through 30, so this was defined as the peak period.
