Local health officials are pushing for parents to get their children immunized against common diseases before the school year. A new report from the World Health Organization and UNICEF shows about 25-million children around the world haven’t gotten immunizations against diseases like diphtheria. Baltimore County Public Schools says about three-thousand students from kindergarten through the seventh grade are missing shots they need before school starts in September. The Baltimore County Health Department has kept its clinics open throughout the summer for children to receive needed shots. It warns that student whose immunizations aren’t up to date within 20 days into the school year will not be allowed to enter public schools.