Old Age - 80% afflicted in 1 round.

[Turin]

I found that growth3 really helps a lot vs getting afflictions. In my testgames for the worthy heroes mod, I have a few guys living for 25 years (=300 turns) in old age without picking up a single affliction.

Of course they are still not immune and a few of them die, but with growth3 and/or deathmagic you can mostly ignore the old age giving afflictions thing.