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The challenges of sustaining measles elimination in Canada

N S Crowcroft1,2,3

  • 1Public Health Ontario, Toronto, ON.

Canada Communicable Disease Report = Releve Des Maladies Transmissibles Au Canada
|May 18, 2018
PubMed

Insights

Canada effectively controls measles, but vigilance is crucial due to its high contagiousness. Prioritizing immunization for international travelers is key to preventing outbreaks from imported cases.

Area of Science:

  • Public Health
  • Infectious Disease Epidemiology
  • Immunization Programs

Background:

  • Measles importations into Canada have generally not resulted in large outbreaks, suggesting good disease control.
  • However, isolated large outbreaks highlight the ongoing need for vigilance against measles.
  • Measles is the most infectious known disease, posing challenges due to difficulties in identifying and targeting under-immunized populations.

Purpose of the Study:

  • To assess the current state of measles control in Canada.
  • To identify challenges in managing measles outbreaks.
  • To emphasize the importance of immunization for international travelers.

Main Methods:

  • Analysis of measles importation and outbreak data in Canada.
  • Review of factors contributing to measles transmission.
  • Evaluation of strategies for outbreak prevention and control.

Main Results:

  • Canada demonstrates effective control of measles, with most importations not leading to widespread transmission.
  • Challenges in measles control include the virus's extreme infectivity and difficulties in reaching certain populations with immunization.
  • Travel-related importations are a primary source of measles cases in Canada.

Conclusions:

  • While measles is generally well-controlled in Canada, sustained vigilance and targeted immunization strategies are essential.
  • Immunization of Canadians traveling outside the Americas is a priority to prevent imported measles cases.
  • Global progress in measles elimination is necessary to prevent importations into Canada.

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