(NBC News) -- The number of measles cases nationwide continues to rise, but not as dramatically as it has in recent weeks.
A child with symptoms of measles. (Source: Mayo Clinic)
The U.S. Centers for Disease Control and Prevention reports there have been 880 measles cases since the beginning of the year.
Oklahoma has joined the list of 24 states with measles cases. New York has been impacted the most, with more than 700 cases.
Some states, such as Connecticut and Maine, are working to limit reasons parents can cite for not vaccinating their children. And two weeks ago, Washington’s governor signed a law that says parents with children going to daycare or school will no longer be able to claim personal or philosophical objections to the measles, mumps and rubella vaccine.
Lawmakers in Oregon were considering similar legislation, but a bill was killed in the Senate to make way for a tax on large businesses in that state.