Data from other statistical authorities
includes individuals who have undergone a COVID-19 PCR test and/or antigen test (rapid test) from February 2020 onwards at microbiological departments, TestCenter Denmark, private COVID-19 test providers, or municipalities, schools, and educational institutions that report to MiBa (test results for all samples) through various solutions and technical levels.
https://www.dst.dk/en/TilSalg/Forskningsservice/Data/Andre_Styrelser