Response to Letter to the Editor: Importance of considering high-risk behaviours in COVID-19 vaccine effectiveness estimates with observational studies
van Ewijk, Catharina E and Hahné, Susan JM and Knol, Mirjam J and on behalf of all co-authors of the original article, Eurosurveillance, 28, 2300044 (2023), https://doi.org/10.2807/1560-7917.ES.2023.28.4.2300044