More states are looking to end non-medical exemptions for vaccinations as the measles outbreak continues to spread.

According to the CDC, there have been 940 diagnosed cases across the country. Of the 26 affected states, New York has been hit the hardest, with 785 cases in New York City and Rockland County since September.

New York isn't the only state calling for an end to non-medical exemptions. Maine passed a bill Friday similar to what New York is trying to do, becoming only the fourth state in the U.S. to ban non-medical exemptions to all vaccines.

In April, Washington State Gov. Jay Inslee signed a law removing personal exemptions from the measles, mumps and rubella vaccines. Religious and medical exemptions are still allowed.

And in Oregon, legislators are working on a bill to ban non-medical exemptions.