Additional file 1. Appendix 1. Modeling long-lasting symptoms after a confirmed SARS-CoV-2 infection based on the longitudinal follow-up data from the Belgian COVIMPACT study. Appendix 2. Imputation of the COVID-19 mortality dataset. Appendix 3. Comparison of YLL estimates of the COVID-19 burden in Belgium using the Global Burden of Disease Remaining Life Expectancy Table (2019) and the Belgian National Life Expectancy Table (2019). Appendix 4. Overview of distributions of disability weights approximated by a beta distribution using the 95% uncertainty interval around the DW. Appendix 5A. Figure with an overview of prevalent cases and deaths in each health state for the year 2020 by day and age category. Appendix 5B. Figure with an overview of prevalent cases and deaths in each health state for the year 2021 by day and age category. Appendix 6. Table with an overview of important public health measures taken in response to the COVID-19 crisis during the period 2020-2021. ...