![Rick Pollack, American Hospital Association CEO and President standing in front of United States flag and the AHA seal.](/sites/default/files/2022-04/AT-Rick-Pollack-Perspective-2022-News-900x400.jpg)
During the omicron wave, the Pfizer or Moderna COVID-19 vaccine was 87% effective at preventing emergency and urgent care visits and 95% effective at preventing hospitalizations in adults who received a third dose in the prior two months, according to a study released by the Centers for Disease Control and Prevention.