More Measles Cases -Here’s the Data

This past month a recent perspective article (NEJM 2014; 371: 1661-3) provides an update on measles and the problems with vaccination rates.

Key points:

  • More measles cases in 2014 (592 thru Aug 29) than in any year in the past 20.  Already, the number of cases this year is >3-fold the number in 2013 and ~10-fold more than in 2012
  • Most cases are due to infections acquired during travel or due to cases being brought into U.S. by foreign travelers
  • Problem has expanded due to increasing number of unvaccinated children.  Vaccines “that remain in the vial are completely ineffective.”
  • Measles remains one of the most contagious illnesses and typically one person can infect up to 18 susceptible persons.  Due to its contagiousness, a high level of herd immunity (>92-94% immune) is needed to prevent sustained spread of virus.
  • Measles can be deadly with case fatality rate of 0.2% to 0.3% in the developed world and much higher in the developing world (2-15%).
  • Even a few cases are very expensive to control. A 2004 Iowa outbreak of only three patients cost more than $140,000 to contain/investigate.  An outbreak in Arizona with only 7 patients cost more than $800,000.

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2 thoughts on “More Measles Cases -Here’s the Data

  1. Pingback: “Not Up For Debate: The Science Behind Vaccination” | gutsandgrowth

  2. Pingback: The President-Elect and the Anti-Vaccine Crowd | gutsandgrowth

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