Erratum to “Impact of delta variant and vaccination on SARS-CoV-2 secondary attack rate among household close contacts” [The Lancet Regional Health – Western Pacific 17 (2021) 1002... oleh Oon Tek Ng, Vanessa Koh, Calvin J. Chiew, Kalisvar Marimuthu, Natascha May Thevasagayam, Tze Minn Mak, Joon Kiat Chua, Shannen Si Hui Ong, Yong Kai Lim, Zannatul Ferdous, Alifa Khairunnisa bte Johari, Mark I-Cheng Chen, Sebastian Maurer-Stroh, Lin Cui, Raymond Tzer Pin Lin, Kelvin Bryan Tan, Alex R. Cook, Prof. Yee-Sin Leo, Prof. Vernon J.M. Lee