Abstract
Abstract
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.
Publisher
Cambridge University Press (CUP)
Subject
Infectious Diseases,Epidemiology
Reference15 articles.
1. Utility of neutralization test for laboratory diagnosis of suspected mumps
2. 2. Portuguese Directorate-General of Health (2019) Despacho n.o 12513-B/2019. Available at https://dre.pt/home/-/dre/127659250/details.
3. 9. Instituto Nacional de Saúde Doutor Ricardo Jorge (2017) Inquérito Serológico Nacional 2015–2016: Doenças Evitáveis por Vacinação. INSA IP, editor. Lisboa.
4. 3. Portuguese Directorate-General of Health (2015) Sistema Nacional de Vigilância Epidemiológica (SINAVE) Orientação para Autoridade de Saúde. Available at https://www.dgs.pt/ficheiros-de-upload-2013/sinave-orientacao-as-e-usp-pdf.aspx.
5. Large outbreak of mumps virus genotype G among vaccinated students in Norway, 2015 to 2016