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  • Title: Stability evaluation of vaccines: WHO approach.
    Author: Knezevic I.
    Journal: Biologicals; 2009 Nov; 37(6):357-9; discussion 421-3. PubMed ID: 19729320.
    Abstract:
    The stability of vaccines has a major impact on the success of immunization programmes worldwide. In line with this, clear definition of the stability characteristics of a vaccine is of critical importance. One of the concerns at country level is whether vaccines will remain potent on its way from the manufacturer, through the distribution channels, to the final users and vaccine recipients. In response to the requests for assistance in defining stability profile of vaccines, the Expert Committee on Biological Standardization (ECBS) in October 2006 agreed that new WHO guidelines be established on stability evaluation of vaccines (http://www.who.int/biologicals/publications/trs/areas/vaccines/stability/en/index.html). This document applies to all vaccines against infectious diseases. The aim of this guideline is to provide the scientific basis and guiding principles for evaluation of vaccine stability for the purpose of clinical trial approval, licensing, and post-licensure monitoring. As part of its initiative to promote use of vaccines of assured quality, WHO emphasizes the role of National Regulatory Authorities (NRAs) and National Control Laboratories (NCLs) in overall vaccine evaluation, including stability assessment. While recognizing that manufacturers are responsible for the quality of the vaccines they produce, compliance with vaccine quality specifications is part of regulatory oversight. This article provides basic information about WHO international standards as well as key definitions and principles for stability evaluation of vaccines that are elaborated in detail in the above mentioned guidance document.
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