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 counts were as follows: Influenza A had 40.0 RNA copies per liter, Influenza B had 0.0 RNA copies per liter, and RSV had 40.0 RNA copies per liter. Compared to the previous 30 days, these values suggest a stable presence of Influenza A and RSV, while Influenza B remains undetected. Year-to-date and all-time data would provide further context, but based on the current snapshot, Influenza A and RSV are actively circulating in the population, whereas Influenza B is not currently detected in the wastewater.