7264
This mechanism can have a role in directing the cytolytic action of NK cells towards the virus-infected and cancer cells .
 NK cells, virus-infected and cancer 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:
 NK cells, virus-infected and cancer cells