Table 1. Combined data for SARS-CoV-2 RNA positive HCWs by role and screening arm, from the present study and our previous study (Rivett et al., 2020).

Difference in proportions of HCWs testing positive through the symptomatic screening arm was analysed using Pearson’s chi-square test.

Role	HCW asymptomatic screening arm	HCW symptomatic screening arm	Total number of hospital employees
Nurse	25	19	3621
Healthcare assistant	14	8	1734
Doctor	8	6	1871
Cleaners	2	3	560
Radiographer	2	1	217
Radiology support worker	0	1	35
Physiotherapist	1	0	116

Overall, 360 individuals underwent repeat testing, either as part of the asymptomatic screening programme, or for other reasons as previously described (Rivett et al., 2020). The median turnaround time from sample arrival in the laboratory to final verification was 18 hr 45 min. Positive results were called out on the same day, with negative results emailed within 24 hr.