Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Kuster, S P; Shah, P S; Coleman, B L; Lam, P P; Tong, A; Wormsbecker, A; McGeer, A (2011). Incidence of influenza in healthy adults and healthcare workers: a systematic review and meta-analysis. PLoS ONE, 6(10):e26239.