COVID-19 clusters in a teaching hospital during the second wave of the SARS-CoV-2 pandemic in France: a descriptive study and lessons learned for waves to come
Résumé
A total of 92 COVID-19 clusters involving 1,156 individuals (729 patients and 427 healthcare workers) occurred in Lyon University Hospital between 1st September 2020 and 31st March 2021, mostly on medical and geriatric wards. The number of clusters was closely correlated to the trend in COVID-19 community incidence over time; in-hospital clusters did not persist when community incidence decreased. Recommended preventive measures were not fully applicable due to specific ward-associated determinants and patient characteristics.