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.
A capella group Pentatonix performed without a bass voice, after Avi Kaplan opted to leave the group. In a heartfelt video, he bid adieu to his fans and explained why he chose to depart. Find out who replaced Avi Kaplan and more about the mesmerizing singer, right here. Avi Kaplan was an integral part of a capella group, Pentatonix.