In a manner that is characteristic of something native to or restricted to a particular region or population.
Adverbial form of 'endemical,' created by adding the '-ly' suffix to the adjective. This follows standard English word-formation patterns where '-ly' converts adjectives to adverbs describing how or in what manner something occurs.
When scientists say a disease exists 'endemically' in a region, they're emphasizing it's not a temporary outbreak but a permanent feature of that place's health landscape, like how certain plants are endemically found nowhere else on Earth.
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