CDC: Highest Number of U.S. Measles Cases Since 2000

The number of measles cases in the United States this year has risen to 288, the highest number for one year since the disease was eliminated from the country in 2000, the Centers for Disease Control and Prevention said Thursday.

This also is the largest number of measles cases that the country reported in the first five months of a year since 1994, according to the CDC. Health officials say there were 764 cases of measles at this time in May 20 years ago, and 963 by the end of that year.

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Elimination means there is no continuous disease transmission for at least 12 months in a specific geographic area. Measles is not native to the United States anymore, but cases may arise as people bring the disease into the country from abroad.

Of this year’s measles cases, 52% are adults age 20 or older. Those infected so far this year range in age from 2 weeks to 65 years.

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Serious complications and death may result from measles, which is highly contagious. {snip}

“Ninety percent of all measles cases in the United States were in people who were not vaccinated or whose vaccination status was unknown,” the CDC said in a news release.

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The 288 cases were reported in 18 states from January 1 to May 23, the CDC said.

Nearly all of this year’s cases (97%) were associated with importations from at least 18 countries. {snip}

Half of the cases are in people who traveled back from the Philippines, where a large outbreak has been ongoing since October of last year. That country has reported 32,000 cases, including 41 deaths due to measles.

The largest U.S. outbreak so far this year is in Ohio, with at least 138 cases, according to the CDC. The outbreak began with a group from Christian Aid Ministries, who went on a mission to the Philippines earlier this year.

The next largest outbreaks occurred in California (60 cases), and New York City (26 cases).

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