AI Summary

A Stanford study examined 14.4 billion health‑insurance records from over 244 million Americans to assess long COVID. Researchers found that conventional methods may overestimate how widespread and how long the disease’s effects last. Long COVID is defined by persistent symptoms such as brain fog, fatigue, dizziness, rapid heart rate, shortness of breath, and chest pain that can affect nearly every organ system and last a year or more after infection. The analysis suggests that the true burden of long COVID may be smaller than previously reported.

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