Quick post here. There is a news story about a preprint of possible interest. Scientists report (in the non peer reviewed preprint) that they were able to find evidence for the novel coronavirus in sewage even before cases were reported in the town where the sewage is from.
Dutch scientists were able to find the coronavirus in a city’s wastewater before Covid-19 cases were reported, demonstrating a novel early warning system for the pneumonia-causing disease.
Source: How to Find Coronavirus? Dutch Scientists See Signs in Sewage – Bloomberg
Preprint here.