Fig. 1.

Epidemic curves showing number of new SARS-CoV-2 PCR staff and inpatient positives at Oxford University Hospitals from 17 November 2020 - 5 January 2021 based on clinical microbiology laboratory diagnosis by PCR. (A) total number of staff and inpatient positives (blue bars showing new positives per day, black line shows 7 day rolling average) (B) SARS-CoV-2 positives split by staff and patients (nosocomial (definite, probable and indeterminate) and community-onset according to national surveillance definitions), lines show 7 day rolling average. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)