NATIONAL–Arizona neighboring states of California and Nevada are among 21 states that the Centers for Disease Control and Prevention said Tuesday have reported cases of the measles.

Others states include: Arkansas, Connecticut, Florida, Illinois, Indiana, Kansas, Louisiana, Maryland, Michigan, Missouri, New Jersey, New York, North Carolina, Oklahoma, Oregon, Pennsylvania, Tennessee, Texas and Washington.

To date, the number of cases reported stands at 107, which may surpass the 118 cases reported in 2017 and the 86 from 2016.

The CDC reported the highest number of cases were back in 2015 when 188 people contracted measles. This outbreak was later linked to an amusement park in Southern California.

The CDC classifies measles as 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. Some people may suffer from severe complications, such as pneumonia and brain swelling, which could result in hospitalization or death.

Cases of people contracting measles are typically unvaccinated, travel to a part of the world, which includes some countries in Europe, Asia, the Pacific and Africa, where the virus is still common; travelers with measles enter the United States; or the virus is spread when it reaches a community in the United States where groups of people are unvaccinated.

For more on measles, visit the CDC’s website at www.cdc.gov.