User blog comment:Spetsnaz117/Who would win? A Chimeran Titan from Resistance 2 or a Covenant Hunter from Halo 3?/@comment-422690-20100531010924

Regardless on whether or not the Pure Chiimera created the Chimeran Virus (after all, who's to say thay can't telepathically manipulate genetic code? who said they need arms? and again, there is the confusion with "sentient" and "sapient". A wolf is sentient but not sapient. A tree is neither. A human is both.), there is definately something going on with the whole "earth virus immunity" thing. While the hosts could have been immune to some Earth bacteria, there is no gaurantee that they are immune to all viruses. Even with the increased reate of evolution, there should still have been large swaths of dead chimera whenever they changed geographic reigons.