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A recent Longitudinal Study into COVID-19 that studied patients with a high burden of persistent symptoms found...................no specific cause. So as @DavieJones said if you can crack the code - find the cause or find the biomarker - it would be BIG. Big in the global sense of the word. It would start a race for therapeutics for an addressable market in the US alone of 7.7-23m people, according to the GAO.

It appears that the good doctor featured in the video linked by DJ may also be well known to US audiences. In fact, Dr Igor Koralnik appears to be the go-to-guy on Long Covid. He's certainly well known to ANP shareholders and the question of who approached who is intriguing. What we do know is that the results of the proteomics study arising from the collaboration between ANP and Dr Koralnik will be confidential to ANP for purposes of patent application.

Dr Koralnik posits in the aforementioned video that the next step is finding out what causes long Covid in the first place and why some people get it and others don't. The very real possibility that inflammation contributes to the neurological effects is starting to leave me quite breathless.