Jack Osbourne, the 26-year-old son of rock musician Ozzy Osbourne and music manager Sharon Osbourne, has been diagnosed with Multiple Sclerosis.
Other celebrities afflicted with the nerve disorder include actress Lola Falana, the late comic Richard Pryor, and R&B singer Tamia.
MS is a disease in which the body's immune system attacks its own nerve cells by eating away at the sheath that protects the nerves similar to the insulation coating covering electrical wires in your home.
Once the protective coating on the nerve is damaged, the flow of electricity from the brain to the body is interrupted.
People with severe cases of multiple sclerosis may lose the ability to walk or speak, according to the Mayo Clinic.
There is no cure for multiple sclerosis. But with medication and therapy the debilitating symptoms of MS may be alleviated, delayed or controlled (for a long period time). 40% of people with MS reach the 70th year of life. The main cause of death of people with MS is suicide.