Commentary: The key to demystifying long COVID-19 could come from studying another chronic condition

Before the COVID-19 pandemic, 1.5 million people in the U.S. were estimated to have myalgic encephalomyelitis/chronic fatigue syndrome, or ME/CFS, with an annual economic impact of $36 billion to $51 billion. Due to COVID-19, the total ME/CFS prevalence could rise to between 5 million and 9 million people. This would cause the annual U.S. economic impact to rise to $149 billion to $362 billion in medical expenses and