SVT has previously reported on a study at Västmanland Hospital in Västerås, where health care professionals working at the infection clinic are tested every three weeks for antibodies to covid-19.

According to the study, seventh medical personnel were on antibodies at the end of May, something that has not yet changed when the next test results came in late June.

Do you expect some of the test results to be inaccurate?

- There are always things that you can think about. As for the antibody test we use it is safe and we trust it a lot, says Mulki Rashid.

The study has now come halfway through and will continue until autumn 2020.