Transferring inpatients between wards drives large nosocomial COVID-19 outbreaks, Wales, United Kingdom, 2020-22: a matched case-control study using routine and enhanced surveillance data
Description
As the role of the hospital environment in the spread of COVID-19 is unclear, we measured associations between ward characteristics and outbreak size to inform mitigations. We compared wards with large (case-wards) and small (control-wards) outbreaks
