Wastewater could provide up to a week of warning for a COVID-19 spike
Finding coronavirus RNA in sewage may signal that people in a community are infected
![wastewater plant](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/05/052720_EG_sewage_brief_feat.jpg?fit=1028%2C579&ssl=1)
Genetic material from the coronavirus can be detected in patients’ stool and wastewater from water treatment plants, like this one just south of Houston. A new study adds to evidence that sewage may serve as an early warning signal for COVID-19 hot spots.
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