1074
Whether virus-induced NF-kappa B activation is a mechanism that favors continuous viral replication in macrophages remains unknown.
 macrophages, NF-kappa B
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:
 macrophages, NF-kappa B