User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-1213255-20121219233225/@comment-76.25.119.47-20121220041940

But that's wrong, though. Feral wyvern virus increases the damage the hunter recieves and doesn't leave a red portion of your health bar to regenerate, but in return your weapon gradually gains affinity as you continue attacking the monster. This has been known for months.