Comparison of control and transmission of COVID-19 across epidemic waves in Hong Kong: an observational studyResearch in context by Bingyi Yang, Yun Lin, Weijia Xiong, Chang Liu, Huizhi Gao, Faith Ho, Jiayi Zhou, Ru Zhang, Jessica Y. Wong, Justin K. Cheung, Eric H.Y. Lau, Tim K. Tsang, Jingyi Xiao, Irene O.L. Wong, Mario Martín-Sánchez, Gabriel M. Leung, Benjamin J. Cowling, Peng Wu

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