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Bengaluru to track coronavirus in wastewater

Wastewater testing can serve as a cost-effective early warning system

The Government of Karnataka is introducing a city-wide sewage surveillance system in Bangalore that will help officials track the virus at an early stage, even among asymptomatic individuals.

Assisting this effort is the United States Agency for International Development (USAID) and the Skoll Foundation-supported COVIDactionCollab (CAC), an India-wide collaborative of over 300 organizations and networks working together to provide COVID-19 relief and recovery services to the country’s most vulnerable communities.

Over the last year, scientists around the world have discovered that waste-water testing can serve as a cost-effective early warning system, often predicting an increase in COVID-19 before the number of official cases has risen. The Precision Health Platform in Bengaluru, the first of its kind in Asia, will test sewage from both sewered and non-sewered waste-water to identify clusters of new infections. Early identification of clusters can help guide the COVID-19 response and give policymakers the information they need to better allocate limited pandemic resources.

CAC supports the Government of Karnataka by providing training for sanitation workers and lab technicians on collecting and transporting sewage samples to labs for testing; and analysing and safely disposing of them. The Technical Expert group will provide programmatic inputs and insights to policy makers for targeted COVID-19 prevention, care, and management services based on the analysis.

The Government of Karnataka plans to begin testing across 45 wards in Bangalore. Rakesh Singh, Additional Chief Secretary, Urban Development says, “The system will cover over 75% of Bengaluru’s nine million population by generating over 90 data points per week signalling the emerging COVID-19 clusters or signalling a COVID-19 cluster’s exit from an area. We are happy to be the first in India to launch this platform.”

Although sewage testing is not a replacement for clinical testing and citizens are advised to continue following safety guidelines, this surveillance system is cost effective tool that can be used not only for COVID-19, but in the future, it can also track other pathogens with pandemic potential and measure antimicrobial resistance in the population.

“While there have been many experiments and studies on finding traces of the COVID-19 virus in sewage, Bangalore will be joining the Netherlands, Finland, and Israel in path-breaking surveillance system like this with experts from all over the world supporting the initiative,” said Dr Angela Chaudhuri, Health Lead of COVIDActionCollab.

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