Sewage Could Provide Early Warnings About Coronavirus Outbreaks

The coronavirus SARS-CoV-2 is often spread through sneezes and coughs, but it also leaves the human body through our waste. Scientists around the world are now testing sewage for the virus, using it as a collective sample to measure infection levels among thousands of people.

Here's How Much Coronavirus Testing We Need

Widespread testing is key to lifting social distancing and preventing more waves of COVID-19. According to William Hanage, an epidemiologist at Harvard a guiding principle is to aim for a 10% or lower positive results from testing.