Maintenance work on the ZORA database servers is scheduled for Thursday 25th July 2019 from 19:00-20:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Kuster, S P; Tuite, A R; Kwong, J C; McGeer, A; Fisman, D N (2011). Evaluation of coseasonality of influenza and invasive pneumococcal disease: results from prospective surveillance. PLoS Medicine, 8(6):e1001042.