RT Journal Article SR Electronic T1 Case Studies on Changes and Proposed Process Development Approaches reflecting applicability of PDA Technical Report No. 89 Strategies for Vaccine Development and Lifecycle Management JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP pdajpst.2024.012976 DO 10.5731/pdajpst.2024.012976 A1 Campa, Cristiana A1 Clenet, Didier A1 Halpern, Jane A1 Le Palaire, Lyne A1 Krishna, Mahesh A1 McGoldrick, Mic A1 Bilanin, Mihai A1 Pattnaik, Priyabrata A1 Pelt, Richard A1 Restrepo, Sabrina YR 2024 UL http://journal.pda.org/content/early/2024/08/29/pdajpst.2024.012976.abstract AB Vaccines are complex and a very diverse group of products with relatively long product lifecycles. The manufacturing programs for these vaccines need to be continually updated to comply with evolving regulatory expectations. Members of the Parenteral Drug Association (PDA) Vaccines Interest Group (VIG) authored and published PDA Technical Report No. 89 Strategies for Vaccine Development and Lifecycle Management (TR 89) which seeks to provide context to vaccine developers and manufacturers regarding key aspects of new or legacy vaccines such as control strategy from process development to vaccine lifecycle management, comparability and lifecycle management including technical, validation, quality and regulatory perspectives. To further explain and illustrate the concepts and topics discussed, seven relevant situations were selected as either case studies associated with changes implemented or proposed process development strategies, which are discussed in this article. The situations described are: working cell bank, modification or update of externally supplied product contact components for vaccine manufacturing, raw material change, new product at an existing site, vaccine development acceleration by leveraging existing platforms, selection and implementation of potency method, and modeling for stability forecast prediction. For each situation, the applicable key concepts from TR#89 are discussed as follows: Control Strategy, Prior Knowledge, Relying on PQS, Classification of Parameters, Validation Approach, Use of a Risk-based Approach, Comparability, Use of ICHQ12 and Additional Regulatory Considerations.