These things scare all of us. But in fact there isn't a whole lot we can do about it.
Once when I taught up north one of the students came to school with 'slap face syndrome'. It is also called Fifth disease. Not harmful to the child but VERY dangerous to women in their first trimester of pregnancy. FOUR staff were in their first trimester including my wife who was training the school secretary. Had to send them all home for quite a while. Anyway, when I went home after a day's work I stripped at the door, put the clothing in a plastic bag and then straight into the washer. Went to the shower. Came out and dressed. Then did the laundry. Went on for about a month.
Rapaire's mention of 'wash your hands' regularly is great advice. If the flu starts near you or your family, face masks are a good idea. But likelihood is that you won't need any of that.