«Ζωή σε σας»

I am wondering when the expression “Ζωή σε σας» friends, is used? Is it an expression of good wishes when something bad happens like a death—or conversely maybe at a baptism?

Thanking you in advance.

Cosmas

Only in the case of death: "may you live long" [in contrast to the deceased, or even since s/he does not live any more].

Hello, Cosmas!

If I'm not mistaken it's only used as a wish when someone has lost a dear person.