of how the infection is spreading has been cut almost 2 years ago. susanna, lucknow of the university of darmstadt, found out that wastewater samples can be used to determine how quickly and how strongly the corona virus is spreading in a region. at that time, she was in the laboratory, looking for an early warning system for waves of corona virus. she struck gold with the waste water. the process caused a stir at the time in the netherlands in spain, and in the u. s. it's much cheaper than doing hundreds of thousands of individual corona virus tests. 20 german municipalities have been taking part in the waste water monitoring pilot project since the end of last year, significantly more have applied to be part of it. the berlin waterworks are also involved samples are taken twice a week, had several sewage treatment plants in the german capital, the participants in the germany wide pilot test to then send the samples to all of oratory for analysis. in order to get results as quickly as possible, berlin, waterworks even bought their own analysis device laboratory head auto bertelsmann says that she