“…These questionnaires are an essential part of any future predictive algorithm, since a very high score on any of them suggests an immediate risk that the disorder is already emerging or present. • Questionnaires regarding general distress experienced by ex-COVID-19 patients during the pandemic, like K10 Kessler Psychological Distress Scale (Andrews and Slade, 2001;Janiri et al, 2020), Perceived Stress Scale (Roberti et al, 2006;Eubank et al, 2021), and Peritraumatic Dissociative Experiences Questionnaire (Marmar et al, 1997;Ranieri et al, 2021). • Questionnaires on COVID-19-specific distress, which are either adapted from existing illness-related questionnaires, like Brief Illness Perception Questionnaire (Broadbent et al, 2006;Hubbard et al, 2021) or newly developed, e.g., Fear of COVID-19 Scale (Ahorsu et al, 2020;Bitan et al, 2020), Post-COVID-19 Functional Status Scale (Klok et al, 2020), and COVID-19 Peritraumatic Distress Index (CPDI) (Qiu et al, 2020).…”