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Cannie_Flippington t1_iugnyjy wrote

Some states that have theoretically eradicated rabies in their animal populations actually drop salt blocks with vaccine in them in high animal traffic areas on their borders to help prevent outbreaks.

https://www.usnews.com/news/news/articles/2022-08-26/usda-scattering-rabies-vaccines-for-wildlife-in-13-states

This article is about a recent effort by the fed but I'm certain some individual states have been doing it for far longer.

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