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However , it is now known that the mites only feed once in their lifetime , which means that transmission from rodent to human via the mites is impossible ( for it to have been possible , the mite would have to feed at least twice , once on the infected rodent and again on the human who would then be infected ) .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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