On Oct. 6, 2021, the World Health Organization (WHO) announced the first official definition of what constitutes long COVID.
The medical community has been aware that while most people recover from COVID-19 within a matter of weeks, some will experience lingering symptoms for 4 or more weeksTrusted Source after developing COVID-19.
Until now, there has not been a formal definition for this condition.
Referring to it as “post COVID-19 condition,” the document says that long COVID “occurs in individuals with a history of probable or confirmed SARS-CoV-2 infection, usually 3 months from the onset of COVID-19, with symptoms that last for at least 2 months and cannot be explained by an alternative diagnosis.”
The definition further states that common symptoms may include fatigue, cognitive dysfunction, and several others that can impact daily functioning.