COVID-19 Nosocomial Transmission Dynamics, a Retrospective Cohort Study of Two Healthcare Associated Clusters in a District Hospital in England during March and April 2020.

Respiratory exposure anywhere within a 4-bedded bay was a risk whereas non-respiratory exposure required bed distance ≤2.5m. Standard Infection control measures required beds to be >2m apart; our study suggests this may be insufficient to stop SARS-CoV-2 spread. We recommend improving cohorting and further studies into bed distance and transmission factors.