findings were reported in The New England Journal of Medicine. RELATED: White House outlines plans to increase COVID-19 testing in schoolsAntibodies are Y-shaped proteins than bind to one's foreign invaders, like viruses, bacteria, fungi and parasites.Researchers studied 1, 497 fully vaccinated health care workers at Sheba Medical Center out of 11,453 fully vaccinated workers.
All had been vaccinated with the Pfizer-BioNTech COVID-19 vaccine. They were tested for breakthrough infections from December 19, 2020, to April 28, 2021, due to a known exposure with someone who had COVID-19 or possible symptoms of the virus.
Thirty-nine workers had a confirmed breakthrough case, bringing the infection rate to 0.4%, Many had mild to no symptoms and.