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 13,600 RNA copies per liter, Influenza B had 0 RNA copies per liter, and RSV had 40 RNA copies per liter. Compared to previous periods, these values provide insight into current trends. If Influenza A levels are higher than in the past 30 days, it suggests an increase in circulation, while a decrease would indicate a decline. Similarly, the absence of Influenza B suggests it is not currently circulating in significant amounts. The RSV count of 40 RNA copies per liter can be compared to historical data to determine whether its presence is increasing or decreasing. This ongoing analysis helps public health officials monitor and respond to viral trends effectively.