What is the name of the treatment with leeches?
Hirudotherapy Leeches have been used in medicine for thousands of years. Leeches remove blood from their host, and they release pain-killing (anesthetic) and blood-thinning substances with their saliva. Today, they're mostly used in plastic surgery and other microsurgery. This is because leeches secrete peptides and proteins that work to prevent blood clots.
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Which diseases are exceptionally common among Amishes?