Health-related quality of life in seven European countries throughout the course of the COVID-19 pandemic: evidence from the European COvid Survey (ECOS).

"Declarations Competing interestsThe authors have no relevant financial or non-financial interests to disclose. Ethical approvalThis study was performed in line with the principles of the Declaration of Helsinki. This study received ethical approval from the University of Hamburg in Germany (under the umbrella project "Countering COVID-19: A European survey on the acceptability and commitment to preventive measures"). Consent to participateEach participant provided written informed consent to Dynata. The confidentiality and anonymity of the participants were ensured. Consent to publishNot applicable. Competing interests The authors have no relevant financial or non-financial interests to disclose."

"Funding This project has received funding from the German Research Foundation (DFG) under project number 466310982 and the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 721402, the work was supported by funding under the Excellence Strategy by the German federal and state governments, as well as by the University of Hamburg, Erasmus School of Health Policy & Management and Nova School of Business and Economics Lisbon–Chair BPI | “Fundação La Caixa” on Health Economics. Open Access funding enabled and organized by Projekt DEAL."