[Daynarr]

In short, you better start new game. As Jomon you really don't any way to counter disease after turn 2 as you either need some higher level spell and good nature magic or you need some healer which Jomon doesn't have. Another 'way' is for your pretender to get killed and when he returns some or all his afflictions can be cured. However, you lose magic levels for your pretender that way and there is no guarantee it will cure disease so I really don't recommend it.