12992
Among these subsets, Th1 cells are known to activate cellular immunity resulting in inflammatory response , whereas Th2 cells induce humoral and allergic responses and suppress inflammation .
 Th1 cells, Th2 cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Th1 cells, Th2 cells