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Letters

Polio immunity in Ontario

Subhash C. Arya and Nirmala Agarwal
CMAJ November 09, 2010 182 (16) 1762-1763; DOI: https://doi.org/10.1503/cmaj.110-2122
Subhash C. Arya
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Nirmala Agarwal
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With reference to the article by King, 1 the population in Ontario cannot be considered to be fully immune to poliomyelitis when one considers the immune status of people 60 years of age and older. In all probability these individuals were never vaccinated against poliomyelitis during their infancy, childhood or adolescence. The vaccines were not available before 1960.

Such people could become infected with paralytic poliomyelitis if they were exposed to wild, live or vaccine-derived strains in the event of any importation and dissemination of the virus in Ontario or during a trip abroad. Indeed, two healthy British men, aged 62 and 65 years, were infected with paralytic polio while holidaying in Morocco. 2

REFERENCES

  1. 1.↵
    King A. Ontario immunization rate for polio. CMAJ 2010;182:1331–2.
    OpenUrlFREE Full Text
  2. 2.↵
    Joce R, Wood D, Brown D, et al. Paralytic poliomyelitis in England and Wales 1985–91. BMJ 1992;305;79–82.
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Canadian Medical Association Journal: 182 (16)
CMAJ
Vol. 182, Issue 16
9 Nov 2010
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Polio immunity in Ontario
Subhash C. Arya, Nirmala Agarwal
CMAJ Nov 2010, 182 (16) 1762-1763; DOI: 10.1503/cmaj.110-2122

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Polio immunity in Ontario
Subhash C. Arya, Nirmala Agarwal
CMAJ Nov 2010, 182 (16) 1762-1763; DOI: 10.1503/cmaj.110-2122
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