Three more probable cases of measles are now reported in Prairie North Health Region, in addition to the one confirmed case announced last week in the region.The four cases are in unimmunized children and youth under the age of 16. Prairie North Health Region says officials are taking steps to notify members of the public who may have been exposed. The list of public locations where individuals may have been exposed to the measles virus is expanded. For further information see the story under the Northwest Region tab.