UNTITLED — Children headed to summer camp may have to first stop at the doctor's office for vaccinations.

More camps are urging families to follow vaccination policies in the wake of measles outbreaks across the United States. There have been 1,044 cases nationwide so far this year.

Some camps require all participants to be vaccinated against measles, even children of parents who have religious objections. A camp's decision to accept such exemptions typically depends on what its state or city requires for schools.