User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-118.137.140.117-20121214044024/@comment-74.193.211.56-20121214081238

It isn't the virus and if you want proof just watch the TGS trailer near the end with the infected Tigrex and Goa Magara. When the hunter gets struck the aura around him is dark purple and black while the photo that is shown the aura surrounding him is not the same color along with the fact he's weilding dual swords which hints greatly toward demonization. All in all I'm sure it is not the Dragon Virus.