I find tracking waste water very interesting and here is Switzerland it has been done for a while now. It may allow to find outbreaks before the population does

I find tracking waste water very interesting and here is Switzerland it has been done for a while now. It may allow to find outbreaks before the population does testing regimes. https://www.swissinfo.ch/eng/-sewage-doesn-t-lie--when-tracking-covid-19/46582322 https://www.swissinfo.ch/eng/-sewage-doesn-t-lie--when-track...