Children are allowed either a religious or medical exemption.

If school and child care vaccination records are not up to date, the child will be sent home Wednesday.

Heather Kaisner is with the Deschutes County Health Department.

"The law in Oregon is you have until February drop dead date to get shots.  Many feel it shoudl be September.  But with the issues of the busyness of school,  they do this.  But I agree.  I think it should be earlier."

Deschutes County sent more than one thousand letters to parents and guardians informing them their children need immunizations to stay in school.