Hand Sanitizers

In the spirit of complete randomness, Hand sanitizers in classrooms do not reduce school absences in children -- ScienceDaily

All children received a 30-minute in-class hand hygiene education session. In those schools randomly assigned to the intervention group, alcohol-based hand sanitizer dispensers were installed in the classrooms over two winter terms and the children were asked to use the dispensers after coughing or sneezing and on the way out of the classroom for morning break or lunch.

... the length of illness and length of absence from school, or the number of episodes in which at least one other family member became ill. When using school attendance records from all children in the participating schools, the number of absences for any reason and length of absence episode did not differ between the intervention and control schools.

Okay, I'm surprised.

(When you learn something that surprises you, you're being educated. Yay!)