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. 2017 Jul 14;13(8):1928–1936. doi: 10.1080/21645515.2017.1319022

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© 2017 Crown copyright. Published with license by Taylor & Francis

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.

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Figure 2. — Comparison of immunization coverage estimates reported by select Canadian Provinces and as estimated by the 2013 childhood National Immunization Coverage Survey (cNICS): Pertussis

Notes:

1. Two-year old immunization coverage data for the Regional Health Authority of Vancouver Coastal Health are not included within the provincial estimate because coverage for this region is assessed periodically using survey methods.

2. Manitoba coverage estimates can be found online: http://www.gov.mb.ca/health/publichealth/surveillance/mims/docs/2012.pdf

3. Quebec assessed coverage for children born between Oct 1 and Dec 31, 2011 using a coverage survey. The coverage definition used was receipt of at least 4 valid doses, with validity of doses assessed in relation to a minimum age at first dose and minimum intervals between doses.

4. The 2011-2012 fiscal year birth cohort was used in PEI and this only includes those born in PEI.

5. Immunization coverage for measles at 7 years-of-age in British Columbia is derived from Panorama and the immunization registry in use in Vancouver Coastal Health (PARIS). In three regional health authorities, Ministry of Education data is used for denominator estimates. Coverage is defined as 4th or 5th dose of diphtheria/acellular pertussis/tetanus and 3rd or 4th dose of polio after the fourth birthday and by the 7th birthday.

6. Ontario has historically calculated 'complete for age' coverage, which represents the proportion of students who are not yet 'overdue' for a particular immunization. For the cohort assessed, the pre-school booster was considered valid if given on or after the age of three years and nine months.

7. PEI assesses coverage by agent. Coverage among 7 year olds reflects administration of the Tdap-IPV pre-school booster administered between the ages of 4 and 6 years.

8. Ontario has historically calculated 'complete for age' coverage, which represents the proportion of students who are not yet 'overdue' for a particular immunization. For the cohort assessed, the pre-school booster was considered valid if given on or after the age of three years and nine months.