The Caithness Business Index has posted the following article:

We Tested The Wastewater From Planes To Detect Covid Among Travellers - Here's What We Found

Small traces of many pathogens, such as viruses we may be infected with, are excreted when we go to the toilet. Ultimately, these agents find their way to municipal wastewater treatment plants where sewage samples can be taken and the levels of these pathogens measured. [Read Full Article]