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  • Title: Factors affecting the stability of viral vaccines.
    Author: Peetermans J.
    Journal: Dev Biol Stand; 1996; 87():97-101. PubMed ID: 8854006.
    Abstract:
    The stability of viral vaccines is determined by the rate of loss of "integrity" of the viral antigen during storage. For live vaccines, such as measles, mumps, rubella, canine distemper, stability is equivalent to the preservation of the infectious titres. For inactivated and subunit vaccines, the preservation of the antigenic structure and the correct steric presentation of the relevant epitopes are the parameters which determine their stability. In general, the following factors may have a negative effect on stability: temperature, pH outside the physiological limits, organic solvents, repeated freezing and thawing, some antiseptics and inactivating agents, and light. However their negative effect is in most cases specific for the individual viruses. Approaches to stabilisation of most vaccines are based on the elimination or neutralisation of the negative factors. Practical examples for the most relevant existing vaccines are described.
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