Ashton Kutcher says he battled vasculitis, a rare disease that left him unable to see, hear or walk: 'Lucky to be alive'

Ashton Kutcher says he is "lucky to be alive" after a private battle with a rare autoimmune disorder. The actor says a rare form of vasculitis took away his sight, hearing and ability to walk.

LOS ANGELES -- Actor and producer Ashton Kutcher says he is "lucky to be alive" after a private battle with a rare autoimmune disorder.

The health scare took place about two years ago.
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Kutcher made the revelation on the National Geographic series "Running Wild with Bear Grylls."

The actor says a rare form of vasculitis took away his sight, hearing and some of his motor control. Kutcher told Grylls it took him about a year to build himself back up.
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The episode of "Running Wild" aired Aug. 8 on National Geographic.

The Walt Disney Company is the parent company of National Geographic Partners and this ABC station.

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Ashton Kutcher says he's 'lucky to be alive' after battle with rare autoimmune disease