Surveillance of SARS-CoV-2 in Wastewater at the Population Level: Insights into the Implementation of Non-invasive Targeted Monitoring in Singapore and the USA

M. Leifels^*, W. L. Lee, F. Armas, X. Gu, F. Chandra, D. Cheng, W. C. Kwok, F. J.D. Chua, S. Y. Kim, W. J. Ng, D. Nainani, K. Sirikanchana, E. Sozzi, A. H. Farnleitner, F. Wu, S. Wuertz, J. Thompson