Healthcare Workers’ SARS-CoV-2 Infections in Four Hospital Outbreaks during Delta Variant Prevalence in Sydney, Australia

Table 3

Summary of HCW clusters in NSW during Delta epidemic 2021 (epidemiological weeks 24–43).

HCW cluster	Hospital A	Hospital B	Hospital C	Hospital D
Local area identified as increasing community transmission	18 July 2021	28 July 2021	8 August 2021	7 September 2021
Outbreak date	23–30 July 2021; epidemiological week 31	13–20 August 2021; epidemiological week 33	14–21 August 2021; epidemiological week 33	9 September 2021; epidemiological week 36
Vaccination rate	>50%	Approx. 80%	70%	92%
Wards associated with cluster	Acute aged care, neurology (29 patients)	Oncology (6 inpatients)	Oncology, orthopedic	Acute aged care
Number of HCW with workplace-acquired SARS-CoV-2 infection
Noncritical care wards	7	2	8	3
Critical care wards	0	0	0	0
PPE policy in place at the commencement of the outbreak
Noncritical care wards	Surgical masks for patient care (as per CEC guidelines)	Surgical masks for patient care (as per CEC guidelines)	Surgical masks for patient care (as per CEC guidelines)	Surgical masks for patient care (as per CEC guidelines)
Critical care wards (ED, ICU, and COVID-19 wards)	Contact and airborne precautions (respirator mask)	Contact and airborne precautions (respirator mask)	Contact and airborne precautions (respirator mask)	Contact and airborne precautions (respirator mask)

Determined by NSW department of health.