RT Journal Article SR Electronic T1 Animal Cell Substrates: Back to the Future JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 375 OP 378 VO 64 IS 5 A1 Petricciani, John YR 2010 UL http://journal.pda.org/content/64/5/375.abstract AB The acceptability of animal cell substrates for the manufacture of biological products, especially vaccines, has been an issue in one form or another since the development of cell cultures in the 1950s. Here the major cell substrate events of the past 50 years are briefly reviewed, and recent progress in resolving longstanding issues is highlighted.