Quite right, I must have sneezed 3 or 4 times today, dust up nose etc. I don't have the virus (that I know of)... Humans cough and sneeze it's a fact. You even only have to look at somebody talking in sunlight to see how much spit comes out of people's mouths... And that's before you even start to think about hands on surfaces etc.
... And it'll be hay fever season soon