Yes it is in the air and yet we don't exchange saliva with everyone and are encouraged to wash hands to avoid infection. It's especially crucial with a weak immune system. My son wasn't getting ill just by being around other kids but started getting ill frequently when he shared toys with other kids and they all put them in their mouth... just a coincidence I guess.

Well, if you looked into the science... it really is quite unhygienic.

So your hand is unworthy but your mouth is? Both are your body parts. I don't think any part of my body is worthy so I can receive Him in a way I honour Him the most.

I'd so downvote you for these comments because they are just the hostility I was talking about. But I won't do that because I think downvoting people unless they are antisocial, advocating sin and similar doesn't bring any fruit but is just unnecessary nastiness.