User blog comment:Garfield 123/What Alien Species From Metroid Would Be the Largest Threat to Mankind in Today's World?/@comment-1741964-20101020211713

Actually it was more like 70 haha. Yes I very much doubt that the Ing being more animal than infectious disease could not reproduce as fast as the X could. Besides that I think the Ing come in a close second but for sure the X are worst of the bunch, especially considering the Chozo( a normally peaceful race) built something as nasty as a metroid to take them down.