14706
These studies show a decreased ability of WS - exposed pulmonary macrophages to effectively mount a defense against infection , the effect lasts at least a week post - exposure , and appears to be mediated via RelB activation .
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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:
 None