Mumps outbreak among fully vaccinated school-age children and young adults, Portugal 2019/2020

On 16–17 January 2020, four suspected mumps cases were reported to the local Public Health Authorities with an epidemiological link to a local school and football club. Of 18 suspected cases identified, 14 were included in this study. Laboratory results confirmed mumps virus as the cause and further...

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Detalles Bibliográficos
Autores principales: Perez Duque, Mariana, San-Bento, Ana, Léon, Lourdes, Custódio, Paula, Esperança, Maria Anjos, Albuquerque, Maria João, Nascimento, Marina, Balasegaram, Sooria, Sá Machado, Rita
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cambridge University Press 2021
Materias:
From the Field
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8447046/
https://www.ncbi.nlm.nih.gov/pubmed/34446124
http://dx.doi.org/10.1017/S0950268821002028
Descripción
Sumario:On 16–17 January 2020, four suspected mumps cases were reported to the local Public Health Authorities with an epidemiological link to a local school and football club. Of 18 suspected cases identified, 14 were included in this study. Laboratory results confirmed mumps virus as the cause and further sequencing identified genotype G. Our findings highlight that even with a high MMR vaccine coverage, mumps outbreaks in children and young adults can occur. Since most of the cases had documented immunity for mumps, we hypothesise that waning immunity or discordant mumps virus strains are likely explanations for this outbreak.

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