RT Journal Article SR Electronic(1) A1 Arashiro, Takeshi A1 Arima, Yuzo A1 Kuramochi, Jin A1 Muraoka, Hirokazu A1 Sato, Akihiro A1 Chubachi, Kumi A1 Oba, Kunihiro A1 Yanai, Atsushi A1 Arioka, Hiroko A1 Uehara, Yuki A1 Ihara, Genei A1 Kato, Yasuyuki A1 Yanagisawa, Naoki A1 Nagura, Yoshito A1 Yanai, Hideki A1 Ueda, Akihiro A1 Numata, Akira A1 Kato, Hideaki A1 Oka, Hideaki A1 Nishida, Yusuke A1 Ooki, Takao A1 Nidaira, Yuki A1 Stucky, Ashley A1 Suzuki, Tadaki A1 Smith, Chris A1 Hibberd, Martin A1 Ariyoshi, Koya A1 Suzuki, Motoi YR 2023 T1 Letter to the editor: Importance of considering high-risk behaviours in COVID-19 vaccine effectiveness estimates with observational studies JF Eurosurveillance VO 28 IS 4 SP 2300034 OP DO https://doi.org/10.2807/1560-7917.ES.2023.28.4.2300034 UL https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2023.28.4.2300034