Data extraction and analysis
Swab result data for HCWs and patients were extracted directly from the hospital-laboratory interface software, Epic (Verona, Wisconsin, USA) and from SARS-CoV-2 point of care testing. Data for SARS-CoV-2 infections from the local community were extracted from Public Health England’s Data Dashboard.4 Data were collated using Microsoft Excel, and figures produced with GraphPad Prism (GraphPad Software, La Jolla, California, USA). Fisher’s exact test was used to compare the proportion of HCWs testing positive in this study period to that of our previous study period1. Pearson’s Chi-square test was used for comparison of the proportions of HCWs testing positive in each job role.