Opening your windows even on the coldest days for minimum of 15 minutes to air out the house will remove most airborne viruses.
I open my windows in my main area of the daycare daily for 1/2 to an hour each day. Even the nap room gets aired out. My daycare kids hardly get sick, we also try and get as much fresh air as possible.
Great idea! However,my heating company is cheering loudly. Doesn't that get expensive?
Children are great imitators.
So give them something great to imitate.