LOS ANGELES - A Stanford University professor known for his research in genetics and biochemistry was forced to change his focus when his son fell ill with a chronic fatigue syndrome that has been identified in COVID-19 patients and "COVID long haulers."The National Institutes of Health identifies "COVID long haulers" as a "large numbers of patients who have been infected with SARS-CoV-2 continue to experience a constellation of symptoms long past the time that they’ve recovered from the initial stages of COVID-19 illness."The chronic fatigue syndrome Ron Davis’ son suffers from is a relatively common — albeit little understood — illness.Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) is an illness that has been found in.