Really good series of pieces on SARS-CoV-2 wastewater epidemiology by BBC Look North. Credit to Marcos Quintela-Baluja, Kelly Jobling, Vincenzo Padricello, Katie Robins, and Rui Xin. See https://twitter.com/i/status/1323721151005233152 and https://twitter.com/i/status/1323719413191901185.