To cover their mouth when they cough?
I was at a cafe the other day and there was a couple there with a little girl who looked about 4. The little girl had a terrible cough and not once covered her mouth, nor did her parents ask her to.
The little girl coughed all over the table and around the cafe when walking to and from the table and honestly, I thought it was pretty lazy her patents didn't at least ask or try to get her to cover her mouth.
My 3 year old always covers her mouth when she coughs and I'd be horrified if my child coughed and spluttered all over the place in public, especially in a cafe.