3791
In contrast to peptide vaccination , immunization with adenovirus, expressing Ad5E1A , induced Ad5E1A -specific immunity and prevented the outgrowth of Ad5E1A -expressing tumors .
 Ad5E1A, Ad5E1A, Ad5E1A
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:
 Ad5E1A, Ad5E1A, Ad5E1A