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Type I interferons ( IFNs ) are a family of cytokines that have antiviral and antiproliferative effects .
 interferons, IFNs, cytokines
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:
 interferons, IFNs, cytokines