About 7.5% of U.S. adults—roughly 20 million people—are currently living with Long COVID symptoms, according to new federal data from the National Center for Health Statistics (NCHS).

That finding, drawn from the Household Pulse Survey run in partnership with the U.S. Census Bureau, is based on self-reported data from about 62,000 U.S. adults surveyed in June. More than 40% of respondents said they’d previously had COVID-19. And about one in five of those individuals said they still had Long COVID symptoms, defined as new health issues—like fatigue, cognitive issues, difficulty breathing, chest pain, and more—lasting at least three months after infection.

While there’s no single hallmark symptom of Long COVID, many long-haulers report extr…