Lab results have confirmed that six University of Missouri students came down with the mumps, while a seventh suspected case came back negative.

The Columbia Daily Tribune reports the Columbia/Boone County Department of health and Human Services expects lab results for four more suspected cases by the end of the week.

Test results confirmed five mumps cases last week. Health department spokeswoman Andrea Waner says those five and the newest confirmed case all are university students who have had two doses of the mumps, measles and rubella (MMR) vaccine.

The seventh case that tested negative also is a University of Missouri student.

Waner says most people recover fully within a few weeks and serious complications from mumps are rare.

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