Pellagra

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Notion

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Science and technology

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What Wikipedia says

Pellagra is a disease caused by a lack of the vitamin niacin (vitamin B3). Symptoms include inflamed skin, diarrhea, dementia, and sores in the mouth. Areas of the skin exposed to friction and radiation are typically affected first. Over time, affected skin may become darker, stiffen, peel, or bleed.

Excerpt from the Wikipedia article “Pellagra”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Dr James W Babcock (1856-1922), Public domain, via Wikimedia Commons.