(CNN) This year, Washington state is averaging more than one new measles case a day as officials try to stop the disease's spread.

A vast majority of those who came down with measles -- 41 -- were not vaccinated against the disease, Clark County officials said. One patient received a vaccination against MMR (measles, mumps and rubella), but the health agency declined to provide more details on that case "to protect the patient's privacy."

Most of the Washingtonians affected -- 34 -- are children between the ages of 1 and 10.

"Clark County Public Health is urging anyone who has been exposed at an identified location and believes they have symptoms of measles to call their health care provider prior to visiting the medical office to make a plan that avoids exposing others in the waiting room," the agency said.

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