Progeria, also known as Hutchinson-Gilford progeria syndrome (HGPS), is a rare genetic condition that causes a child's body to age fast.Most kids with progeria do not live past the age of 13. The disease affects both sexes and all races equally.rogeria, also known as Hutchinson-Gilford progeria syndrome (HGPS), is a rare genetic condition that causes a child's body to age fast.
Pentatonix is made up of Avi Kaplan, a most distinctive bass; Kevin Olusola, the vocal percussionist or the beatboxer; Kirstie Maldonado, the mezzo soprano and only girl in the line-up; Mitch Grassi who does both tenor and counter-tenor voices; and Scott Hoying, the baritone who sings lead most of the time.
Avriel Benjamin Avi Kaplan (born April 17, 1989) is the bass vocalist of Pentatonix. He and Kevin agreed to join Scott, Kirstie and Mitch to form a band to compete in the NBC singing competition The Sing-Off, and has since gone on to record and tour with Pentatonix, becoming a notable influence in their sound.