This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Which of the following is the ideal culture medium for pox virus 
Select and explain. 
A. Cell culture, B. Chorio-allantoic membrane, C. Hela cell line, D. Organ culture
C: Hela cell line
Answer: C: Hela cell line 
Explanation: The biggest advantage of HeLa S3 cells is that they can be adapted to grow paicularly well in spinner cultures, allowing propagation of more cells per volume of media and by extension, more virus. There really is no such thing as a generic or "normal" HeLa cell line anymore due to the extreme number of passages they have been through.