RT Journal Article SR Electronic(1) A1 Cowling, Benjamin J A1 Sullivan, Sheena G YR 2018 T1 A concern over terminology in vaccine effectiveness studies JF Eurosurveillance VO 23 IS 10 SP 18-00103 OP DO https://doi.org/10.2807/1560-7917.ES.2018.23.10.18-00103 UL https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2018.23.10.18-00103