The effectiveness of revaccination against mumps was studied using different routes for administration of a live mumps vaccine from L-3 strain. Poor reactogenicity of the vaccine was observed after intranasal administration. The highest rise in titres of virus-neutralizing antibody was demonstrated in volunteers given the vaccine by the intranasal route. Revaccination of adults by both intranasal and subcutaneous routes induced production of antigen-specific memory cells. The results of the study attest to the usefulness of the intranasal route of vaccine administration in revaccinations against epidemic parotitis.
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