Ideas in this flowchart

• Studies examine persistent symptoms and post-acute sequelae of COVID-19 over time
• Peter et al. studied post-acute sequelae, persistent symptoms, and clinical findings after acute infection
• Their assessment covered six to 12 months after infection and the second year after acute infection
• Huang et al. reported health outcomes two years after hospitalisation
• Petersen et al. assessed long COVID from disease onset through eight months
• Kamal et al. conducted a four-year prospective cohort study
• The cohort study examined risk factors, recovery, and quality of life