Outbreak of mumps associated with poor vaccine efficacy - Oporto Portugal 1996.
Vaccination against mumps in Portugal began in 1987, with the introduction of the combined measles, mumps, and rubella vaccine (MMR) in the national vaccination programme (Programa Nacional de Vacinacao: PNV) for both sexes at 15 months. In November 1990,
Goncalves
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Centro Regional de Saude Publica do Norte, Portugal.
De Araujo
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Monteiro Cardoso
M.L.
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