The other states included are Arkansas, California, Connecticut, Florida, Illinois, Indiana, Kansas, Louisiana, Maryland, Michigan, Missouri, Nevada, New Jersey, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, Tennessee, and Washington.
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This number will likely outpace the number of measles cases reported in 2017.
There were 118 cases in 2017, and only 86 the year before that.
READ MORE: What is measles? What to know about symptoms, vaccine & treatment
The last outbreak was in 2015 when 188 people contracted measles.
The outbreak was linked to an amusement park in California where it is thought that a traveler from overseas brought it to the U.S.
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Measles is an airborne virus that spreads through coughing and sneezing.
Symptoms show up in 10-14 days after exposure. The symptoms last 7-10 days and include a high fever, cough, runny nose, and red eyes followed by a rash that typically starts on the face and spreads to the rest of the body.
Complications from measles can get much more serious.
RELATED: Measles symptoms: Signs you might have an infection