Talk:Story and History/@comment-166.70.79.222-20140628094231/@comment-75.185.70.22-20140803000110

The technocyte virus easily fits into your theory. The Orokin used the technocyte virus to genetically modify other humans to create the Tenno. Failed experiments resulted in the infested. Anyway, the infested were locked away, then the Tenno destroyed the Outer Terminus, and then destroyed the Orokin. Without the Orokin to babysit the infested, the infested broke out.