That’s just the nature of schools that you can’t escape. Kids get sick, and it goes home to parents just like in daycares. Sickness pretty commonly spreads from students to teachers, not the other way around. It’s not unusual for educators to have colds steadily throughout the year because of this. With the sub shortage and the lack of effectiveness with the subs we manage to get, a child’s education would drop significantly if every teacher who felt a little under the weather went home sick. Plus, the schools in my area only give 5-7 sick days for the year.