Other U.S. states with active outbreaks — which the CDC defines as three or more related cases — include Arizona, Colorado, Georgia, Illinois, Iowa, Kansas, Michigan, Montana, New Mexico, North Dakota, Oklahoma and Utah.

After Texas, New Mexico and Oklahoma, Kentucky has not joined the list of US states to declare a measles outbreak, which as per the CDC means 3 cases must be related. Read more about it here.

There has been nationwide total of 1,267 confirmed cases of measles this year, with Kentucky being the latest state to announce an outbreak, the U.S. Centers for Disease Control and Prevention reported Wednesday.