Even if you dodge you get poisoned. I dont understand the logic but that has been the case, and its not considered as a bug and wont be changed i guess. I think its because it is still counted a hit. If you are facing hidan roshi, killer bee team. Hidan creates 24 hits even if there is a dodger in opposition. But despite the count of 24, it doesnt trigger combo since the minato/masked man dodged. So its considered as a hit but doesnt add up to combo but poisons.

There was a long discussion about this, but cant find the post.