La maladie à coronavirus 2019 associée aux soins de santé (COVID-19) a des conséquences importantes pour les patients, leurs accompagnateurs et le personnel soignant. Le contrôle de la transmission dans les établissements de santé est essentiel pour réduire la mortalité due au COVID-19. Nous avons voulu décrire l’épidémiologie et les caractéristiques des épidémies de COVID-19 associées aux soins de santé et des cas liés à ces épidémies.
Background Healthcare-associated coronavirus disease 2019 (COVID-19) has significant implications for patients, their companions, and healthcare workers (HCWs). Controlling transmission in healthcare settings is critical for reducing COVID-19 mortality. Aim We aimed to describe the epidemiology and characteristics of healthcare-associated COVID-19 outbreaks and outbreak-related cases. Methods We retrospectively analyzed the investigation data of each healthcare-associated outbreak that occurred between 15th January 2020 and 31st July 2021 in Taiwan. We categorized the confirmed outbreak-associated cases as HCW, patient companion, and patient, and compared the characteristics of the confirmed cases among these categories. Findings A total of 54 healthcare-associated COVID-19 outbreaks including 512 confirmed cases were reported. The median number of affected cases per outbreak was 6 (interquartile range [IQR], 2–12), and the median outbreak duration was 12 days (IQR, 4.3–17.0). Only 5.7% and 0.2% of all confirmed cases had partial and full vaccinations, respectively. Most of the outbreaks (90%, 48/54) occurred in May and June 2021. HCW cases accounted for 19.5%, companion cases for 41.2%, and patients for 39.3% of the total cases. Patients were significantly older (72 years; IQR, 61–83) and had higher 30-day all-cause mortality (37.4%) than HCWs (41 years; IQR, 28–58; 0%) and companions (52 years; IQR, 42–62; 1%). Conclusion Healthcare-associated COVID-19 outbreaks have a critical impact on patients. Nevertheless, two-thirds of cases in the healthcare-associated outbreaks in this study comprised HCWs and companions. To effectively mitigate COVID-19 transmission in healthcare settings, multi-pronged infection prevention and control measures should be implemented and tailored for these three groups.