nono, she has no brain activity but the body is still very much alive, there is blood pumping, oxygen circulating, because she's plugged up but the basic body functions remain. They describe her as dead because the minute they plug her off she's gone, but she's on life support, meaning the artificial respirators, feeding tubes, etc are keeping her alive. If she were literally dead then blood, nutrients, etc wouldn't flow through the umbilical cord and the baby would be dead already too.