There was no cure in her world for what happened to her. If I recall my facts correctly,[Which he's not well aquainted to her, but there was a time that a large number of people that inhabited the dome were from her world.] Euphemia was killed in order to stop her.
[By now he's growing irritated and is taking this a little more personally than he probably should. Hands clenching tightly into fists, he turns to walk away and get some needed distance between them for a bit.]
Most people that have nothing but death to welcome them home aren't exactly scrambling to find a way back home to meet their fate.