SARS-Coronavirus-2 cases in healthcare workers may not regularly originate from patient care: lessons from a university hospital on the underestimated risk of healthcare worker to healthcare worker transmission

Table 1 Baseline characteristics and epidemiological key data of the SARS-Coronavirus-2 (SARS-CoV-2) outbreak in the department of nephrology and dialysis

Case number	Function	Onset of symptoms	Date of sample collection for SARS-CoV-2 test	Relevant contact^a prior to onset of symptoms (or positive test if asymptomatic or unknown date of onset of symptoms)
1	Physician	15 March 2020	17 March 2020	None reported
2	Physician	18 March 2020	19 March 2020	Case 1
3	Physician	16 March 2020	20 March 2020	Cases 2, 9
4	Physician	21 March 2020	21 March 2020	Case 2
5	Patient	Unknown	23 March 2020	Case 2
6	Medical student	Unknown	23 March 2020	None reported
7	Medical student	Unknown	23 March 2020	Case 2
8	Nurse	Asymptomatic	23 March 2020	Cases 1, 4, 5
9	Physician	Asymptomatic	23 March 2020	Case 2

^aRelevant contact was defined as direct contact with potentially infectious body fluids (e.g. respiratory tract specimen) without proper personal protective equipment (PPE) (patient to healthcare worker (HCW) contact), or exposure to aerosols without proper PPE (patient to HCW contact), or face-to-face contact under two meters without at least one person wearing a face mask (patient to patient, patient to HCW, HCW to patient and HCW to HCW contacts), or sharing the same patient room (patient to patient contact)

ISSN: 2047-2994