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![AlexionPharma Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::246664765.png) Alexion [@AlexionPharma](/creator/twitter/AlexionPharma) on x 12.4K followers
Created: 2025-06-22 09:00:16 UTC

Neuromyelitis optica spectrum disorder (#NMOSD) is a rare and debilitating autoimmune disease characterised by unpredictable relapses, or attacks. Learn more about the condition below.

![](https://pbs.twimg.com/tweet_video_thumb/GuCUK3aWUAA-gyD.jpg)

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