Maintenance: During the night from Tuesday to Wednesday, 28/29 May 2019, maintenance work on the ZORA NFS is scheduled for 7:00pm to 9:00am. During this period ZORA and JDB will not be available. Thank you for your patience.
Lee, C Y; Naguel, C; Gyurech, D; Duvoisin, N; Schilling, J (2003). Awareness of vaccination status and its predictors among working people in Switzerland. BMC Public Health, 3:18.