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Measles Elimination
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November 5, 2020
[PDF-586.78 KB]
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Description:The United States has maintained measles elimination status for almost 20 years.
While we expect importations of measles cases into the United States to continue, the risk for measles for the majority of the population would still remain low. That is because most people in the United States are vaccinated against measles.
The World Health Organization (WHO) defines measles elimination as “the absence of endemic measles virus transmission in a defined geographical area (e.g. region or country) for at least 12 months in the presence of a surveillance system that has been verified to be performing well.” In 2000, measles was declared eliminated from the United States. That means the disease is no longer constantly present in this country. However, travelers continue to bring measles into the United States, and it can sometimes spread and cause outbreaks among people who are not vaccinated. If a measles outbreak continues for a year or more, the United States could lose its measles elimination status.
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