12230
Post HIV-1 entry , productive HIV-1 infection of primary T cells requires overcoming several cellular blocks to provirus establishment and replication.
 T cells, primary T 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:
 T cells, primary T cells