User blog comment:Testxyz/17/@comment-206.71.232.130-20140212213119/@comment-75.36.141.24-20140213092300

Elizabeth allegedly wipes out the timelines/alternate dimensions/split universes/whatever where Booker became the 'evil' Comstock. So at the end 'Elizabeth' herself is now gone (being a product of being stolen by a Comstock) and is left to die in her crib from a disease ( a fate which befell countless children in that time ).

'Fixing' is a delusion. Elizabeth never existed. No "do-overs".