The NBA has completed a study with infectious disease specialists and testing manufacturers on the preseason antibody test results of 2,300 players and staff, citing further evidence of a need for booster doses of Covid-19 vaccines for league personnel, according to a copy of the study's findings obtained by ESPN.
The NBA's study found Moderna and Pfizer vaccines created higher levels of antibodies compared to Johnson and Johnson and detailed the decline of antibodies over time. The NBA wanted to understand the effectiveness of different vaccines, and what different levels of antibodies might mean for risk of infection.