MADISON (NBC 26) — The Wisconsin Department of Health Services says there are nine cases of measles in Oconto County, the first cases of the highly-contagious virus in the state this year.

According to the DHS, one case was confirmed through testing at the Wisconsin State Laboratory of Hygiene. The other eight confirmed cases were from exposure and symptoms.

"All of the cases were exposed to a common source during out-of-state travel," the DHS said in a news release. "At this time no public points of exposure have been identified and the risk to the community remains low."

The DHS and Oconto County Public Health are working to identify and notify those who may be exposed to the virus.

Health experts say measles is highly contagious and it can spread from person-to-person through the

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