Alexis was kept on a detox. Her body was being detoxed from the drug that she had been given constantly. The blood was being pulled out from her body into a machine for clarifying and then pumped back in.
All this while she was in recovery, she was kept in a medically induced coma. The doctors had yet to decide when to wake her up because, given the physical injuries and the mental toll that it would take on her, they had decided that it would be better to keep her in a coma and then let her deal with all the problems in a professionally advised manner with her body almost recovered.
