Table 2.

Study Sites

Name of study site	Location	Number of employees	Number Of beds	Number of eligible participants, 2016c	Number of eligible participants, 2017d
Soroka University Medical Center	Beer Sheva, Israel	4300b	1074a	2436	2853
Beilinson Hospital	Petah Tikva, Israel	5500b	850b	1988	2260

^aData as of 2016; Data were extracted from Israeli Ministry of Health reports

^bData of 2017; Data were extracted from employee records from the CHS EHR and Israeli Ministry of Health reports

^cRecruitment in 2016 began in October, when nationwide vaccination was already in progress. HCP who had already been vaccinated in the current season were not eligible for the study

^dExcludes participants enrolled in 2016

Number of beds data was obtained from Israeli Ministry of Health reports

Abbreviations: CHS Clalit Health Services, EMR electronic medical record, HCP healthcare personnel