Wastewater-based Surveillance

Abstract

In the AMELAG project, SARS-CoV-2, influenza viruses and respiratory syncytial virus (RSV) are monitored in wastewater. Nationwide, 168 wastewater treatment plants were participating by the end of 2024; up to 70 sites are expected to participate in 2025. The data collected will be integrated into this report in the coming weeks. For the calendar week 9 data from 61 WWTPs for SARS-CoV-2, from 61 WWTPs for influenza A virus and influenza B, from 26 WWTPs for RSV A and B and from 32 WWTPs of RSV A/B (joint measurements of RSV A and B) were available. Data from other WWTP are provided continuously. Over the last weeks, a decreasing aggregated SARS-CoV-2 viral load can be observed. The values of the aggregated influenza A viruses have been falling for about a month, and a rapid decline is now also visible for influenza B viruses for the first time. The RSV load values in wastewater have increased in recent weeks, with the values for RSV B appearing to have increased more rapidly than for RSV A. The aggregated viral load of the combined measurements of RSV A and B is declining for the first time after several weeks of increase. The development observed over the last few weeks may still change due to late notifications.