FRESNO, Calif. — The Fresno County Department of Public Health and Sheriff's Office confirmed 11 inmates tested positive for Mumps at the Fresno County Jail.

According to the Fresno County Department of Public Health, the Sheriff’s Office first became aware of the possible outbreak on Jan. 23. At that time, jail staff and the jail medical provider, Wellpath, put several precautionary measures in place, which continue to remain in effect. These measures include quarantining inmates in specific areas to ensure there is no additional spread of any the illness.

Approximately 300 inmates are affected by the quarantine. All inmates are being assessed daily and immunizations are being offered to both inmates and jail staff.

Inmates in the quarantined area are currently being allowed one visitation per week.

The booking and release process is not being impacted by the virus. However, Wasco State Prison is not accepting any sentenced inmates into its facility until the quarantine is lifted.

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All inmates going through the release process are given educational health materials.

All business at the Fresno Superior Courthouse is currently functioning normally.

At this time, the court is not calling any of the quarantined inmates to the courthouse until the quarantine is lifted.

There is an ongoing investigation to try and determine who the original inmate is that contracted the Mumps virus.