Board Thread:Naruto Discussions/@comment-27521865-20190624190722/@comment-3568954-20190629200651

@LegionZero false. it is a biological fact. just because a few of the members of the clan didn't get effected by it doesn't mean jack diddly diseases tend to run in families yet even if your parent has a disease it doesn't mean you will. the likelyhood of catching said disease will still be in your DNA though.

and the uchiha/rivalry is directly caused by the Curse of hatred