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Measles Elimination in Canada
Arlene King, Paul Varughese, Gaston De Serres, Graham A. Tipples, John Waters and Members of the Working Group on Measles Elimination
The Journal of Infectious Diseases
Vol. 189, Supplement 1. Progress toward Measles Elimination: Absence of Measles as an Endemic Disease in the United States (May 1, 2004), pp. S236-S242
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/30075860
Page Count: 7
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To describe the progress and challenges in achieving measles elimination in Canada, we analyzed national data on measles cases for 1998-2001. To assess the status of measles elimination in Canada, we estimated the effective reproductive number, R. Measles elimination was defined as the interruption of endemic transmission and failure to reestablish endemic transmission after importation. Twelve isolated cases, 29 cases (72.4% were linked to 2 outbreaks), 199 cases (96.9% were linked to 4 outbreaks of 2, 6, 30, and 155 cases), and 34 cases (73.5% were linked to 8 outbreaks of 2, 2, 2, 2, 3, 3, 3, and 8 cases) were reported in 1998, 1999, 2000, and 2001, respectively. R ranged from 0.58 to 0.95. Multiple chains of transmission occurred in religious communities that actively oppose or resist immunization efforts. Epidemiological and virological evidence suggests that endemic transmission of measles has been mostly interrupted since 1998.
The Journal of Infectious Diseases © 2004 Oxford University Press