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Over the last several weeks, local wastewater testing has been picking up increased signals of the virus.

Wastewater testing became an important surveillance tool for COVID-19 spread early on in the pandemic. But it's unclear how long current levels of government funding will continue, and experts are calling on the federal government to create a standardized surveillance system for all of Canada.

Wastewater testing became an important surveillance tool for COVID-19 spread early on in the pandemic. But it's unclear how long current levels of government funding will continue, and experts are calling on the federal government to create a standardized surveillance system for all of Canada.

Wastewater testing, hospitalization and death data from COVID-19 tell us the virus' spread continue to trend downward in Canada. But we're not at the end, and public health experts say we must heed lessons learned from the pandemic and remain vigilant. Read the analysis on CTVNews.ca.

With limited access to PCR testing, wastewater analysis has been key in determining the prevalence of COVID-19 in different communities over recent months. Experts explain what’s involved in the process and how to make sense of the data.