Denmark
Statens Serum Institut
COVID-19, SARS-CoV-2, long-COVID, post-COVID syndrome, Post-Acute Sequelae of SARS-CoV-2 infection, PASC, point-of-care-test, POCT, cross-sectional survey, quality of life, Health-related quality of life, SF-12, short-form-12, Testing Denmark, Denmark, propensity scores, Odds ratio, matching, risk factors