User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-6050823-20130831130544

Things you may not know about Feral Wyvern Virus

Firstly, the virus isn't caused by parasites like many of us thought.

The virus has not mutated Goa Magara or changed it.

Turns out its hairs and scales are just toxic.

When it goes into Feral Wyvern Mode, Goa Magara becomes more toxic.

I'll see if I can find more info.