Johnson & Johnson on Tuesday (Sept. 21) shared data that show administering a booster shot of the company’s one-dose COVID-19 vaccine two months after vaccination provides 94% protection against disease, and that waiting even longer to administer the booster increases the extra shot’s effectiveness. The booster data came from J&J’s phase 3 ENSEMBLE 2 study, which showed that a COVID-19 booster shot given two months after initial vaccination provided 94% protection against moderate to severe disease and increased antibodies by...