[hydatidcyst]

Thanks Walrus, I think I could not make my point clear. I understand that smoking interferes with the immune system (Both Cellular and humoral), no doubt about that. What I did not understand in Tunisia's message was that Tunisia was trying to say smoking leads to decrease in the immunity and thus this causes the diseases. It's not only the interference with the immune system that lead to diseases, smoking can cause many diseases directly.

Anyways, the bottom line is smoking, whether it is active or passive, both are not only dangerous, but DEADLY !!!!