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Importations of Measles Virus in the US

J Infect Dis; ePub 2018 Dec 9; Lee, et al

Imported measles virus cases continue to occur is the US each year, emphasizing the importance of measles vaccination of US residents aged ≥6 months before international travel, according the Advisory Committee on Immunization Practices (ACIP) recommendations. This according to a recent study that describes the epidemiology of international importations of measles virus into the US during the post-elimination era. Among the findings:

  • From 2001‒2016, 553 imported measles cases were reported to the Centers for Disease Control and Prevention.
  • A median of 28 importations occurred each year.
  • The median age of imported case-patients was 18 years; 87% were unvaccinated or had an unknown vaccination status.
  • US residents accounted for 62% of imported measles cases.
  • Overall, 62% of all imported case-patients reported travel to countries in the Western Pacific and European Regions of the World Health Organization during their exposure periods.

Citation:

Lee AD, Clemmons NS, Patel M, Gastañaduy PA. International importations of measles virus into the United States during the post-elimination era, 2001‒2016. [Published online ahead of print December 9, 2018]. J Infect Dis. doi:10.1093/infdis/jiy701.