"Bless You"

They say Bless you when you sneeze it was said that it was a symptom of the plaque or some type of disease

It was originated by the ancient Romans/ Greeks 

It was because people say that the devil or a evil spirit is tacking your soul like if it were escaping by saying Bless you it would stop the spirit/devil tacking your soul.

Since this word is still around to this day and it came to the English language  in the early 20th century