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Association between the 2008–09 Seasonal Influenza Vaccine and Pandemic H1N1 Illness during Spring–Summer 2009: Four Observational Studies from Canada

Table 3

Sentinel test-negative case-control study: ORs (95% CIs) for 2008–09 TIV effect on seasonal and pH1N1 illness overall and stratified by age, with adjustment for relevant covariates, and with additional restrictions as specified.

Table 3