1. Low and decreasing vaccine effectiveness against influenza A(H3) in 2011/12 among vaccination target groups in Europe: results from the I-MOVE multicentre case-control study;Kissling;Euro Surveill,2013
2. Interim estimates of 2013/14 influenza clinical severity and vaccine effectiveness in the prevention of laboratory-confirmed influenza-related hospitalisation, Canada, February 2014;McNeil;Euro Surveill,2014
3. Influenza vaccine effectiveness in the 2011-2012 season: Protection against each circulating virus and the effect of prior vaccination on estimates;Ohmit;Clin Infect Dis,2013
4. The case test-negative design for studies of the effectiveness of influenza vaccine;Foppa;Vaccine,2013
5. The test-negative design for estimating influenza vaccine effectiveness;Jackson;Vaccine,2013