Response to Letter to the Editor: Importance of considering high-risk behaviours in COVID-19 vaccine effectiveness estimates with observational studies.

van Ewijk, Catharina EHahné, Susan JmKnol, Mirjam J2023-01-312023-01-312023-01-313670086610.2807/1560-7917.ES.2023.28.4.2300044http://hdl.handle.net/10029/626377enCOVID-19 vaccine effectivenessconfoundingrisk-behaviourtest-negative designResponse to Letter to the Editor: Importance of considering high-risk behaviours in COVID-19 vaccine effectiveness estimates with observational studies.Article1560-7917Euro Surveill 2023;28(4):pii.2300044