http://widetrends.com – What is a Tay-Sachs disease? How fatal is a Tay-Sachs disease: Tay-Sachs disease is possibly one of the most devastating genetic disorders. It is fatal, and children who are diagnosed with the disease rarely live beyond four years. Children with Tay-Sachs disease appear normal at birth, but when they reach around 3 to 6 months old, they develop symptoms ranging from deafness and blindness to seizures and dementia, which eventually results in death. Read more »