What happens when one conjoined twin dies?
The type of conjoined twin where it's one body but two heads and two people?
If they share major organs like a heart, lungs, or liver they will most likely die. Keep in mind that each case is different and a doctor would have to know the twins history and bodies.
The other dies unless they are surgically separated. I think.
i think they would die to if they shared major organs but if they get separated they should be fine