Coronavirus Disease 2019 (COVID-19) is a newly emerged disease, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The COVID-19 pandemic is having a large impact on the mental and physical health of patients, yet data on the quality of life of post-COVID-19 patients is lacking. There are currently no post-COVID-19 specific measures for quality of life, particularly none which include the views of post-COVID-19 patients themselves. This observational study will recruit participants to contribute their preferences to the creation of a post-COVID-19 specific patient-reported measure on post-COVID-19 quality of life. Participants will be split into three groups: those who were not hospitalised; those who were hospitalised but not in intensive care units; and those who were hospitalised and in intensive care units. The creation of this measure will form phase 1 of the study, with 30-60 participants (10-20 in each group above) recruited to complete online surveys to find out their preferences of areas of life to include in such a measure. This will involve 3 online surveys, 1) to ask which areas of life they feel are impacted and how; 2) to find consensus about the areas to be included; 3) to weight the relevance of these areas in relation to each other. In phase 2 recruitment will open to additional participants and all participants will be asked to complete the finalised post-COVID-19 quality of life measure once a month for 12 months, aiming for a minimum of 100 participants at this stage. All participants will also be asked to complete a demographic questionnaire to inform the analysis of the data.