Hospital-Acquired COVID-19 among Patients of Two Acute-Care Hospitals: Implications for Surveillance.
William E TrickCarlos A Q SantosSharon WelbelMarion TsengHuiyuan ZhangOnofre DoncerasAshley I MartinezMichael Y LinPublished in: Infection control and hospital epidemiology (2022)
Most patients were protected by early and sustained application of infection-control precautions, modified to reduce COVID-19 transmission. Using solely temporal criteria to discriminate hospital- vs community-acquisition would have misclassified many "late-onset" SARS-CoV-2 positive episodes.