SAN ANTONIO -- A young boy is making a full recovery after coming down with a mystery illness.

He nearly died.

Thanks to his mother's prayers and a lifesaving machine at the Children's Hospital of San Antonio, he's back home with his family.

Isaac Garza, 7, just made it through a brush with death.

A day before his first day of school, the McAllen-area boy came down with 104 degree fever.

"He had a rash on his back. He had pain in his neck and a really bad headache along with stomach and check pains," said his mother, Laura Garza.

After a week of doctor visits, Isaac's mother rushed her son to the hospital.

Doctors couldn't figure out what was wrong, and his condition worsened.

His organs started to shut down, and then he coded.

"I remember I would hold his hand, talk to him and just tell him to hang on. 'You're going to be okay.' It is the worst nightmare for a parent because, as a mother, you want to do everything for them. You're sitting in the corner of a room full of strangers, and there's nothing that you can do." said Laura.

It took an hour and a half to resuscitate. He was on a ventilator when he was airlifted to the Children's Hospital of San Antonio.

There he was put on an ECMO, a lifesaving machine that does the work of the lungs and heart so they can heal.

After a month-long hospital stay, Isaac is on the road to a full recovery.

His illness is still a mystery. However, doctors said his symptoms are similar to Kawasaki disease, a childhood illness affecting blood vessels.

"I want to go home and play with my brother," said Isaac.

As for Isaac's mother, she's counting her blessings.

"Here he is. [He is a] shining light, and we're blessed. I thank God every single day," she said.