User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-21371438-20140313215541/@comment-184612-20140314170339

There is no resistances or immunity. The game just doesn't have quests with infected versions of certain monsters. Quests with the Infected Icon are the only ones that contain Infected monsters.

I really hate all this misinformation that's been going around.