Measles--United States, January 1-April 25, 2008

    Insights

    Measles elimination in the U.S. is threatened by imported cases, primarily affecting unvaccinated individuals. Maintaining high vaccination rates is crucial to prevent measles transmission and control outbreaks.

    Area of Science:

    • Public Health
    • Infectious Diseases
    • Epidemiology

    Background:

    • Measles, a highly contagious viral illness, can cause severe complications and death.
    • The U.S. declared measles elimination in 2000 due to successful vaccination programs.
    • Reported measles cases significantly decreased post-elimination, averaging 29-116 annually from 2000-2007.

    Purpose of the Study:

    • To describe measles cases reported in early 2008.
    • To provide guidance on preventing measles transmission and controlling outbreaks.
    • To emphasize the importance of vaccination in maintaining measles elimination.

    Main Methods:

    • Analysis of preliminary measles case data reported to the CDC.
    • Review of case demographics, vaccination status, and importation links.
    • Assessment of public health response strategies.

    Main Results:

    • 64 confirmed measles cases reported January 1-April 25, 2008, the highest by that date since 2001.
    • 54 cases were linked to international importations.
    • 63 of 64 patients were unvaccinated or had unknown vaccination status.

    Conclusions:

    • Imported measles cases pose an ongoing risk to the U.S.
    • Unvaccinated individuals are at high risk for measles infection.
    • Sustaining high vaccination coverage is essential for preventing measles resurgence.

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