![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)
In a study of over 7,000 adults hospitalized with COVID-19 symptoms, unvaccinated patients with prior SARS-CoV-2 infection were five times more likely to have laboratory-confirmed COVID-19 than were patients fully vaccinated against COVID-19 and no previous infection, the Centers for Disease Control and Prevention reported.