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Millions of Americans affected by Long COVID (LC) report difficulty accessing care and support. One barrier is obtaining a diagnosis. In response, US federal agencies commissioned a National Academies of Sciences, Engineering, and Medicine (NASEM) committee to re-examine the existing federal definitions for LC. The Committee concluded that LC is "an infection-associated chronic condition (IACC) occurring after SARS-CoV-2 infection that is present for at least 3 months as a continuous, relapsing and remitting, or progressive disease state that can present as singular or multiple symptoms and/or diagnosable conditions." The full report was released in June 2024. We briefly highlight features and aspects of the definition that may help clinicians identify those who remain undiagnosed and improve care for all LC patients.
As the pandemic of acute SARS-CoV-2 infection continues, there is another pandemic that shadows it—the growing population of people who have new, continuing, or recurring symptoms long after initial infection. Many refer to this condition as “long COVID,” and the National Institutes of Health's (NIH) official name for the condition is postacute sequelae of SARS-CoV-2 (PASC). Whatever we call it, the current limited understanding of the pathophysiology, epidemiology, and course of this condition makes caring for these patients a vexing challenge.
