She is so vulnerable that to go in her hospital room, you need a mask and gloves.
"She is the most important thing in my life - I just want to make sure we have many more years together," said Ayelet's father.
"Ayelet has a severe bone marrow deficiency that impairs her ability to support an immune system and so getting a transplant is going to be her lifeline," said Ayelet's mother.
"It is a 15 second swab inside your cheek to see if you're a match to save a life," Isabel added.
The family and DKMS have organized a donor-registration drive where people can stop by to get swabbed all day Sunday.