I heard that a person is immune to a virus that he is already affected with, if that is the case then tissues present a more real threat to the spread of virus because they are contagious and thrown carelessly. Talking about situation, do you know what is that we like to keep in our hands and close to our face without knowing that this thing is grubbiest, with much more germs than an innocent Romall has?
Good points... but then on the other hand, allergies are not contagious.