User blog comment:Jack Pistol/Immortal Dovahkiin?/@comment-3543563-20121002040043

"Immortal" and "invincible" are different things -- immortal doesn't mean you can't be killed, it just means you can't be killed like a mortal can (by age, or illness, or perfectly normal weapons.) That might help clarify things some but then it still begs the question, why are there diseases in Skyrim?