>Do you know why you say "Be healthy" (or "Bless you"), when you sneeze?

Because it's customary - and I surely don't say the parenthesised version.

>Before Jacob people didn't have sickness before they died. They sneeze and then die. Jacob was the first to be sick before death according to Torah.

My wife is in charge of medical literature, not I :).

>In Russian you say "Будь здоров", BTW.

Ah, confused it with some other language - thanks. I'm sometimes getting confused by similarities between languages, and sometimes inside a single language. Presently reading Anna Karenina in Russian, I discover that the noble writer says "otvorit'", just like we say, and when I was learning the language it was already "otkrit'", and whoever said "otvorit'" was chided. Reading Tolstoy surely won't get me updated on the language :).