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So his research team decided to test a vaccine in mice with Alzheimer ' s more like that seen in many humans .
 his, his research team, many humans
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 his, his research team, many humans