Q. Is ALS an old-person's disease, or does it affect every age group?
Amyotrophic lateral sclerosis usually strikes between the ages of 40 and 70, but there have been cases of it in young adults, children and older people. The average age for getting ALS is 55.
ALS is known as Lou Gehrig's disease in the USA. Gehrig, who played baseball for the New York Yankees, died of the disease in 1941.
In other countries, ALS is often called motor neuron disease. It is not contagious.