Table 1. Selection criteria for the systematic literature analysis.

Criterion	Description
Population	Inclucion: General population. healthcare workers (e.g.. physicians. nurses). irrespective of age and health status; exposure to SARS-CoV-2 pandemic; all countries Exclusion: COVID-19 patients or other patient groups; other infections (e.g.. MERS. SARS. Ebola. HIV. influenza)
Endpoints	Inclusion: Assessment of psychological distress (e.g.. anxiety and worry. depression. posttraumatic stress. sleep. stress) and/or assessment of protective factors. including resilience or risk factors Exclusion: no exclusion criteria
Study design	Inclusion: Questionnaire-based cross-sectional and longitudinal studies (survey-based studies) Exclusion: Interventional studies
Publication language	All
Publication formats	Inclusion: Original articles Exclusion: Other publication formats (e.g.. reviews. letters to the editor. comments)
Publication status	Inclusion: Peer-reviewed publications

COVID-19. coronavirus disease 2019; HIV. human immunodeficiency virus infection; MERS. Middle East respiratory syndrome; SARS. severe acute respiratory syndrome