The NBA has “recommended” that players, coaches, and referees receive a vaccine booster shot in a league memo that was obtained by The Associated Press on Sunday. The memo reportedly recommended those who had received the Johnson & Johnson vaccine get a Pfizer or Moderna booster. Those who received Pfizer or Moderna vaccines are encouraged to receive whichever booster shot is available. The news comes as approximately 97 percent of NBA players have already been reportedly vaccinated. However, new data has shown the levels of antibodies drop significantly after six months for Pfizer and Moderna vaccines, and two months for Johnson & Johnson. Those who are eligible to receive a booster shot and refuse to do so could face game-day testing as early as Dec. 1. The testing date will depend on when the person was originally vaccinated and which brand of the vaccine was used. The report follows the recent controversy …