18572
A single neonatal infection programs the function of immune cells within the brain , called microglia , for the life of the rodent such that an adult immune challenge results in exaggerated cytokine production within the brain and associated cognitive deficits .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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