Conditions when all damage is negated

[Zaran]

I think raw says the ongoing damage applies but just last week I told someone that since their shield of protection absorbed the damage of a duergar beard quill the poison didn't get through. This is as case of Rule of Cool to me.

 

[DracoSuave]

Just to throw this in, you were perhaps confusing resisting all damage with immunity. If you are immune, you do ignore all effects as well.

Unless the immunity is a damage type not named (poison), in which case, only damage is negated. Alternatively, if the immunity is a condition or keyword not named 'poison' or 'gaze', the damage won't be negated.

So the rule you're thinking of exists for immunity only.

and even then, not completely.

 

[was]

There are many substances that can poison you just by coming into contact with them. Being injured is not always required to introduce a toxin into your system.