In other words you have no idea what caused the epidemic . . .

Judging from our examinations the displayed deviations appear to be innate . . . But in the medical files of the infected there isn't even a hint of such congenital problems - up till then they were healthy.

So their organisms under- went a sort of mutation?

Indeed. It appears that the very structure of the cells changes! The DNA double helix somehow morphs . . . It's truly unbelievable!

Enter, Luna-15.