They just started the study and will last at least a year. But here is the press release of the munich university. https://www.lmu-klinikum.de/aktuelles/pressem

They just started the study and will last at least a year. But here is the press release of the munich university. https://www.lmu-klinikum.de/aktuelles/pressemitteilungen/munchner-tropeninstitut-beginnt-stichprobenanalyse-zur-verbreitung-der-corona-pandemie-und-zur-wirksamkeit-von-gegenmassnahmen/6afa2c06cb6745a9 https://www.lmu-klinikum.de/aktuelles/pressemitteilungen/mun...