Searching for the Definition of Long Covid: “Case Definitions” and Candidate “Diagnostic Criteria”

Long Covid is now regarded as a chronic disease that follows from an acute infection of SARS-CoV-2. Patients themselves were at the forefront of developing the scientific understanding of the disease, which was followed up by government related health institutions. This analysis describes how the patient led research initiated the development of the institutions’ “case definitions” of long Covid and which of these definitions is the more suited to providing a set of “diagnostic criteria” for long Covid.