Stat: 11%: An estimated 11% of U.S. adults who have ever had COVID-19 are currently experiencing symptoms of long COVID, which can last three months or longer. This suggests that millions of people across the country could be affected.

Story: Long COVID is a health condition that's continuing to puzzle scientists. Since the outbreak of COVID-19, doctors saw some patients who would recover quickly, while other people's symptoms continued to worsen—and many symptoms varied widely and lasted long after the initial infection.

In this episode of "From Lab to Life," Keyla Sá, a researcher at Yale University School of Medicine, discusses her work tracking how long COVID develops and a new artificial intelligence tool that can identify the infection's symptoms and patterns that scientists might not normally recognize.