The University of Hong Kong - Environmental Microbiome Engineering and Biotechnology Lab, The University of Hong Kong - School of Public Health, The University of Hong Kong - Environmental Microbiome Engineering and Biotechnology Lab, The University of Hong Kong - Environmental Microbiome Engineering and Biotechnology Lab, The University of Hong Kong - Environmental Microbiome Engineering and Biotechnology Lab, The University of Hong Kong - Environmental Microbiome Engineering and Biotechnology Lab, The University of Hong Kong - School of Public Health, Government of the Hong Kong Special Administrative Region - Drainage Services Department, Government of the Hong Kong Special Administrative Region - Drainage Services Department, Government of the Hong Kong Special Administrative Region - Environmental Protection Department, Government of the Hong Kong Special Administrative Region - Environmental Protection Department, The Chinese University of Hong Kong - Department of Medicine & Therapeutics, The University of Hong Kong - School of Public Health, The University of Hong Kong - WHO Collaborating Centre for Infectious Disease Epidemiology and Control, The University of Hong Kong - School of Public Health, The University of Hong Kong - School of Public Health and The University of Hong Kong - Environmental Microbiome Engineering and Biotechnology Lab