I know how hard it is to be a teacher. My mom would be out the door for most of my life before I woke up and would typically get home after 7:00 pm. Folks don't get that 12 hours is a pretty typical workday for many teachers.
It seemed inevitable that we'd all get sick at some point in the school year. Even though we would get yearly flu shots, we'd still come down with an illness and pass it between all the family members.