22q11.2 deletion syndrome is caused by the deletion of a small section of chromosome 22. It results in a cleft palate, heart defects, autoimmune disorders, and more. The symptoms vary wildly and can be accompanied by learning disabilities and mental illness. Cystic fibrosis is caused by a point deletion.
The melody of Happy Birthday to You comes from the song  Good Morning to All , which has been attributed to American siblings Patty Hill and Mildred J. Hill in 1893, although the claim that the sisters composed the tune is disputed.
Here is the traditional .mp3 version of the happy birthday song in English. This is one of those songs that everyone will know and be used to. This classic version of the birthday song keeps the traditional melody of the song and is easily to follow along with. I suggest this for any ages over 12.