Comparative effectiveness of 3 or 4 doses of mRNA and inactivated whole-virus vaccines against COVID-19 infection, hospitalization and severe outcomes among elderly in Singapore by Celine Y. Tan, Calvin J. Chiew, Vernon J. Lee, Benjamin Ong, David Chien Lye, Kelvin Bryan Tan

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Impact of Delta Variant and Vaccination on SARS-CoV-2 Secondary Attack Rate Among Household Close Contacts by 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 JM Lee

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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... by 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

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