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Mia Rabson Professor Robert Delatolla poses in front of a pumping station used to collect wastewater samples that are screened for COVID Thursday April 8, 2021 in Ottawa. THE CANADIAN PRESS/Adrian Wyld April 11, 2021 - 4:00 AM OTTAWA - When Ottawa Public Health officials are trying to decide whether restrictions in the city need to tighten up, they look to the normal markers like positive tests, patients in hospital, and outbreaks. But they are also among the few in the country that take cues from the city s sewers. Using municipal wastewater to look for evidence of the virus behind COVID-19 is part of a rapidly expanding body of science. The virus is shed in human waste, often before a patient even knows they are sick.

Northwest territoriesUnited kingdomBritish columbiaMia rabsonAdrian wyldRob delatollaBernadette conantRobert delatollaMonir tahaUniversity of california mercedCanadian water networkOttawa public healthUniversity of ottawaProfessor robert delatollaChief executive officerVera etches