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Mystery brain disease affecting hundreds in Canada: memory loss, seizures, and behavioral changes

Mark Frauenfelder
Feb 06, 2025
∙ Paid

A preserved brain (Keni/shutterstock.com)

In 2021, I wrote a short item titled "Canada investigating a cluster of 42 cases of a mad cow-like brain disease." CBC reported at the time that the first case had been diagnosed in 2015. The mystery disease had killed 5 people by 2021. All of the people afflicted lived in the New Brunswick area.

Today, the number…

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