Tracking Viruses in Sewage: A Two-Year Study in India

If we could predict outbreaks of flu and COVID-19 just by looking at what's in our sewage. That's exactly what scientists did in Pune, India. They spent two years, from January 2022 to December 2023, collecting sewage samples from 11 different areas. They used a special technique called reverse transcription-quantitative polymerase chain reaction (RT-qPCR) to find and count tiny pieces of RNA from viruses like Influenza A (H1N1 and H3N2), respiratory syncytial viruses (RSV), and SARS-CoV-2, which causes COVID-19.Guess what? They found virus traces in the sewage before people even started showing symptoms. This means wastewater can give us a heads-up about upcoming illnesses. The scientists also found that the number of virus copies in wastewater matched the number of clinical cases reported. This shows how useful wastewater can be for tracking diseases. During the pandemic, when there were strict measures in place, the amount of virus in the sewage was lower. This shows that public health interventions really do make a difference. The study highlights the power of wastewater-based epidemiology (WBE) in helping us stay one step ahead of viruses. It gives us a way to monitor and manage diseases proactively, keeping our communities safer.