User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4361439-20130313230024/@comment-5963861-20130314100509

@Raging Rajang   As Dippamus says the Unknown Rathian would inflict the virus on the hunter, yet it doesn't so it can't be infected with the ailment. Also as said earlier Goa Magara is indigenous to another region/continent and doesn't come into contact with creatures in the Uknown's native region/continent so it can't infect the creatures there with it's virus.