Long-term sequelae of COVID-19 (myalgic encephalomyelitis): An international cross-sectional study

As a result of prolonged effects on multiple organs, recovery from COVID-19 caused by SARS-CoV-2 cannot be verified. This study seeks to understand chronic and acute long-term symptoms of COVID-19 lasting from a few weeks after diagnosis. The study also aims to gain insight into prevalence of chronic fatigue syndrome/myalgic encephalomyelitis, a potentially comorbid condition for several months after the infection, in addition to taking a broad perspective on rare symptoms that may have developed during or after the infection. STUDY DESIGN: Cross-sectional questionnaire\descriptive study. METHODS: The questionnaire was developed to assess the long-term effects of the global pandemic of COVID-19 using DePaul Symptom Questionnaire-2. The DePaul Symptom Questionnaire, Patient Health Questionnaire, and other symptoms that have been introduced by literature review. DISCUSSION: A large cohort of people from all over the world will be examined to understand the differential effects of people who have experienced COVID-19, as well as the potential occurrence of ME. In total, 20,000 COVID patients are expected to be included in the study by Sep 1, 2022. Patients who have experienced COVID-19 will be asked about their persistent symptoms from 1 week up to more than 6 months after catching or recovery from the infection.