Will a new clade of SARS-CoV-2 imported into the community spark a fourth wave of the COVID-19 outbreak in Hong Kong?. Issue 1 (1st January 2020) - Siu, Gilman Kit-Hang; Lee, Lam-Kwong; Leung, Kenneth Siu-Sing; Leung, Jake Siu-Lun; Ng, Timothy Ting-Leung; Chan, Chloe Toi-Mei; Tam, Kingsley King-Gee; Lao, Hiu-Yin; Wu, Alan Ka-Lun; Yau, Miranda Chong-Yee; Lai, Yvette Wai-Man; Fung, Kitty Sau-Chun; et al.