When you sneeze
Did your sneeze cause someone's illness (or even death)?
It could - if you sneeze into your hands and then greet them with all the germs still on your hands. Or if you then touch the door handle and leave your germs on it for the next person
So should we sneeze and cough into the crook of our arm (front part of elbow), not on our hands?
We've all been told to cover our mouths when we sneeze or cough. This may prevents the spray of germs into the air around us. But, the next thing we touch or give to another person carries them on.
By using the crook of the arm, we limit the spread by air and physical contact.
Off course, If you have a tissue handy, sneeze into it , and then get rid of it (in the dustbin).
If you do use your hand, wash it, or maybe explain to the other person why you are greeting without extending your hands