Williams syndrome is a rare genetic disease which actually makes people extremely friendly and pleasant

Williams syndrome is a disorder of the neurodevelopment which is caused by a deletion of about 26 genes from a strain of chromosome 7. The disease is also known as Williams-Beuren syndrome or WBS. It was discovered by Dr. J.C.P Williams of New Zealand in 1961 and hence, has been named after him. Williams syndrome is extremely rare, in fact one out of 7,500 people have it and it occurs in one out of 20,000 births.
Williams syndrome is a rare condition marked by "elfin" facial features. Children with the disorder are unusually cheerful and at ease with strangers. They have strong language skills and can be overly sociable, with a "cocktail party" personality. In addition, they have an unusual aptitude for music. Autistic children, on the other hand, have problems empathising, communicating and socialising with others.

Research from Yale University has now shown the same small section of DNA appears to be involved in both autism and Williams syndrome, but in opposite ways. Published in the journal Neuron, the research suggests autism is caused by many small genetic variations.
People with Williams syndrome come across as extremely pleasant, friendly and empathetic. The disorder is also characterized by a distinctive ‘elfin’ face appearance, a low nasal bridge and pointy teeth. People who have this disorder have no problem socializing with other; in fact they make friends with strangers within minutes.
It was found out through research, that people with Williams syndrome hold no racial bias. This is because the neural pathway that imprints for race bias is missing in children with this disorder.
As of yet, it has not been discovered that what causes Williams Syndrome, but the deletion of the genes occurs during the production of a sperm or egg cell. Research is already being done to find out why people become so friendly and congenial with the absence of those genes, but as of yet, the answers have not been uncovered.
People who have Williams syndrome, also suffer from physical ailments. They develop heart diseases later in life and most of them do not survive beyond 50 years of age.

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