Basel’s wastewater is regularly tested to see which viruses are circulating in the population. For this, samples are analyzed for RNA copies, which are tiny genetic traces of viruses that people release when they are infected. Measuring these traces doesn’t provide exact case numbers or indicate the severity of an illness, but it helps show whether infections are increasing or decreasing over time. This way, wastewater monitoring works like an early warning system for public health. For more details, you can explore the linked publications and dashboards.

On the most recent day with available data, the RNA copies for RSV were detected at 40.0 copies per liter, while Influenza A and Influenza B were both at 0.0 copies per liter. This suggests that RSV is currently present in the population, whereas Influenza A and B are not showing detectable levels. Without additional context data for the previous 30 days, year-to-date, or all-time, it's not possible to determine whether these levels are increasing or decreasing. However, the presence of RSV indicates that it is circulating, and continued monitoring will help track any changes over time.