Trying to find a solution to this challenge, researchers from KU Leuven, a research university in Belgium, have been working to develop evidence-based guidelines to help health professionals treat patients. They have also been trialling a care pathway designed around the patient and their individual symptoms.
Further information can be found in this article published by WHO
What is the best way to treat a complex new disease like post COVID-19 condition (long COVID)? Researchers in Belgium are developing the answer (who.int)