OLYMPIA, Wash. (AP) — Washington state school district officials announced students must be in compliance with vaccination requirements before returning back to school.

KOMO reports a new state law took effect in July meaning families can no longer opt out of getting the measles, mumps and rubella vaccine because of personal or philosophical reasons.

Officials say the state law still permits religious and medical exemptions.

Seattle Public Schools officials say they sent more than 2,200 letters warning students they would be kept out of school January 8 if they are not in compliance with regulations.