True. But that is not the most dangerous mechanism of transmission. And that can be avoided if those dispensing (and receiving) wear gloves. I've never seen that suggested, but it is a viable solution.
"And more importantly particles from the host will remain on your hand and every bit of the host is our Lord. This may seem trivial to some but that only demonstrates the lack of awareness and reverence of many of the laity due to the casualness of current practices.
And particles of the Host are shed into the air and onto the floor with communion on the tongue as well as the hand. The effective difference between "in the hand" and "on the tongue" is nil.
"As for breathing on the priest’s hand, I never breathe when I’m eating, do you. You open your mouth and automatically stop breathing for a second. You don’t think about it but you do.
Yes, you stop breathing ONCE THE FOOD IS IN YOUR MOUTH, but you are breathing either in or out as the priests hand is approaching your face.
"On the tongue" communion is being restricted because the danger is real, not some nebulous conspiracy to denigrate the Host.
You are wrong about breathing on the priest or EM’s hand. If you are breathing in that moment you have a severe problem and risk choking when you eat. It is an automatic reflex, or habit if you like.
As for you hand not being a problem. Do you shake hands with your waitress or waiter before you eat? Why do you think the authorities are reminding people to do the obvious, wash your hands?