Data from other sources
includes people who from February 2020 have taken a COVID-19 PCR test and/or antigen test (rapid test) with the microbiological departments, TestCenter Danmark, private COVID-19 test providers or municipalities, schools and educational institutions that can report to MiBa (test data for all test results) via various solutions and technical levels.
https://www.dst.dk/en/TilSalg/data-til-forskning/generelt-om-data/data-fra-andre-kilder