Post‒COVID-19 condition, also known as long COVID, is a condition where people experience new or persisting symptoms after an initial COVID-19 illness. CADTH uses WHO’s definition of long COVID. According to this definition, long COVID is when people experience symptoms for more than 12 weeks after an initial COVID-19 infection. People with post‒COVID-19 condition may experience a range of symptoms. Some symptoms include fatigue, shortness of breath, muscle aches, and cognitive and mental health challenges.
This report is part of CADTH’s Condition-Level review on the post-COVID-19 condition. Several subtypes, or different kinds, of post-COVID-19 have been identified. There is still lots of uncertainty about what these subtypes are, and the possible impact they may have on health care systems. Given emerging evidence, there is a need to know more about subtypes of post-COVID-19 condition, and COVID-19 variants.
This CADTH report will provide a custom summary document examining the evidence on subtypes of post-COVID-19 condition. It will also look at any association between different variants of COVID-19 and the developing post-COVID-19 condition.
Projects listed as “in progress” are at various stages and points of completion. These products have different processes and timelines; therefore, the timing of posting of the final reports varies and expected completion dates may change. Find out more about Projects in Progress.
The “Projects in Progress” page on the CADTH website is updated on a seven- to eight-day cycle. Please be advised that there may be overlap between when a new report is posted online and when the section is updated. View our current Projects in Progress.