Immunity to specific disadvantage

[Nereidalbel]

Originally Posted by Hellboy

Would immunity to age based attacks make you immune to having your Unaging Advantage neutralized or negated via affliction?

Would ITABA also make it impossible to be Afflicted with the disadvantage of Short Lifespan ?

Nope and nope, as neither target directly ages you. What you ARE protected against is a handful of spells and Leech with the Steal Youth modifier.