Long‐Lasting Measles Outbreak Affecting Several Unrelated Networks of Unvaccinated Persons | Zendy

Frédéric Dallaire | Zendy; Gaston De Serres | Zendy; FrançoisWilliam Tremblay | Zendy; France Markowski | Zendy; Graham Tipples | Zendy

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Long‐Lasting Measles Outbreak Affecting Several Unrelated Networks of Unvaccinated Persons

Author(s) -

Frédéric Dallaire,

Gaston De Serres,

FrançoisWilliam Tremblay,

France Markowski,

Graham Tipples

Publication year - 2009

Publication title -

the journal of infectious diseases

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.69

H-Index - 252

eISSN - 1537-6613

pISSN - 0022-1899

DOI - 10.1086/644783

Subject(s) - outbreak , measles , epidemiology , transmission (telecommunications) , population , medicine , herd immunity , environmental health , virology , vaccination , demography , sociology , electrical engineering , engineering

Despite a population immunity level estimated at approximately 95%, an outbreak of measles responsible for 94 cases occurred in Quebec, Canada. Unlike previous outbreaks in which most unvaccinated children belonged to a single community, this outbreak had cases coming from several unrelated networks of unvaccinated persons dispersed in the population. No epidemiological link was found for about one-third of laboratory-confirmed cases. This outbreak demonstrated that minimal changes in the level of aggregation of unvaccinated individuals can lead to sustained transmission in highly vaccinated populations. Mathematical work is needed regarding the level of aggregation of unvaccinated individuals that would jeopardize elimination.

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