Diseases: Deafness
Many people don't think of deafness to be a disease, but it is. Deafness is a state where you are not able to hear anything.
Deafness can occur anytime between your birth and death. It is considered to be one of the more common diseases in the nervous system. The most common cause of deafness is a mutation in the connexin 26 gene. It causes about 20% of childhood deafness.