The Oklahoma State Department of Health (OSDH) and local health departments continue their investigation into a mumps outbreak affecting four counties.


The latest data from the OSDH shows that  149  cases have been reported as of Nov.

The following counties have reported cases: Garfield (135), Kay (9), Osage (4) and Tulsa (1).  Cases in Tulsa and Osage counties are connected to outbreak activity in Garfield and Kay counties.

State health officials say that seven out of 10 cases have been reported in vaccinated individuals, while the remainder were not vaccinated or their status is unknown.

In neighboring Arkansas, the case tally (suspected and lab confirmed cases of mumps) has topped 1,200, according to The Arkansas Department of Health (ADH).

The  1,212 cases under investigation include individuals who have displayed symptoms related to mumps or have received lab confirmation that they are positive for the virus.

As of November 9, 2016, Benton, Madison, Pulaski, and Washington are the counties involved.

Eight hundred eleven, or 66 percent of the cases are in children ages 5 to 17.

As of Nov. 5, the Centers for Disease Control and Prevention (CDC) has 2,879 cumulative, provisional mumps cases nationwide.