Untreated, ear infections can lead to more serious complications, including mastoiditis (a rare inflammation of a bone adjacent to the ear), hearing loss, perforation of the eardrum, meningitis, facial nerve paralysis, and possibly -- in adults -- Meniere's disease.
DHEC publishes the School and Childcare Exclusion List each year. The Exclusion List explains how long an ill child, student, school employee, or childcare employee should stay out of school or childcare, and what is needed before the child/student or employee is permitted to return.
Indeed, some of the most controversial elements being overturned or prohibited by the Every Student Succeeds Act were implemented not under No Child Left Behind but through the waiver system. It was through the waivers (and the Race to the Top grant program) that the Obama administration mandated test-score-based teacher evaluations.