Sonia Vallabh saw her mother die at age 52 from a rare disease that causes irreversible brain damage. Then Sonia learned she has inherited the genetic mutation that killed her mother. She and her husband quit their jobs and trained to become scientists. They're now racing against time to come up with a treatment that could save Sonia's life.
Read Sonia's story on NPR's health blog, Shots, and listen to her and Eric on Monday's All Things Considered.