“Out with strep” is a phrase that isn't a surprise for anyone at Concordia Lutheran in Machesney Park. Since January, teachers, students and parents have been taking extra precautions to avoid the contagious infection. More than half of the students have been out sick. One student even came down with scarlet fever. After teaching kids about that scary 7-letter-word, the school shut-down for a day. Teachers came in to scrub away whatever germs were spreading. Dr. Larry Nelson with the Machesney Park Immediate Care Clinic says he's seen an increase in strep. Dr. Nelson says lack of treatment or not finishing medication can lead to scarlet fever.