Sistema de Salut de Catalunya
[Plans P, Torner N, Godoy P] Agència de Salut Pública de Catalunya, Departament de Salut, Generalitat de Catalunya, Barcelona, Spain. CIBER - Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain. [Jané M] Agència de Salut Pública de Catalunya, Departament de Salut, Generalitat de Catalunya, Barcelona, Spain
Departament de Salut
2024-01-25T09:34:26Z
2024-01-25T09:34:26Z
2014-01
Herd immunity; Measles elimination; Seroepidemiology
Inmunidad de grupo; Eliminación del sarampión; Seroepidemiología
Immunitat de grup; Eliminació del xarampió; Seroepidemiologia
Objectives: The objective of this study was to assess the association between lack of herd immunity in some population groups and the re-emergence of measles in Catalonia in 2006. Methods: Herd immunity was considered established in the different population groups when the prevalence of positive serological results to measles was higher than the herd immunity threshold of 90%. The Chi-square test and the odds ratio were used to assess the association between lack of herd immunity and measles cases in the outbreak of 2006-2007. Results: Herd immunity was not established against measles in individuals aged 0-14 years and 25-34 years, as the prevalence of positive serological results was <90% in these groups. In the measles outbreak of 2006-2007, 91% of cases occurred in age groups without herd immunity, and only 9% of cases occurred in age groups with herd immunity (p<0.001). The odds ratio for the association between lack of herd immunity and measles cases in the outbreak of 2006-2007 was 104 (p<0.001). Conclusion: Lack of herd immunity in individuals aged<35 years could be one of the factors underlying the re-emergence of measles in Catalonia.
Article
Versió publicada
Anglès
Immunització; Xarampió - Catalunya; Serodiagnòstic; DISEASES::Virus Diseases::RNA Virus Infections::Mononegavirales Infections::Paramyxoviridae Infections::Morbillivirus Infections::Measles; PHENOMENA AND PROCESSES::Immune System Phenomena::Immunity::Immunity, Herd; Catalonia; ENFERMEDADES::virosis::infecciones por virus ARN::infecciones por Mononegavirales::infecciones por Paramyxoviridae::infecciones por Morbillivirus::sarampión; FENÓMENOS Y PROCESOS::fenómenos del sistema inmunitario::inmunidad::inmunidad de grupos; Cataluña
Elsevier
International Journal of Infectious Diseases;18
https://doi.org/10.1016/j.ijid.2013.09.015
Attribution-ShareAlike 4.0 International
http://creativecommons.org/licenses/by-sa/4.0/
