Biohazard is an American hardcore band formed in Brooklyn, New York, in 1987. They are acknowledged as one of the earliest bands to fuse metal, hardcore, and elements of hip-hop. The earliest lineup consisted of bassist-vocalist Evan Seinfeld, guitarist Bobby Hambel, and drummer Anthony Meo. Guitarist-vocalist Billy Graziadei joined soon after, changing the band to a four-piece. Since 2016, the lineup has consisted of Graziadei, Hambel, and Danny Schuler.

Current members

BillyBio – guitar, vocals (1987–present)Bobby Hambel – lead guitar (1987–1995, 2008–present)Danny Schuler – drums (1988–present)

Former members

Evan Seinfeld – vocals, bass (1987–2011)Anthony Meo – drums (1987–1988)Rob Echeverria – lead guitar (1996–2000)Leo Curley – lead guitar (2000–2002)Carmine Vincent – lead guitar (2002)Scott Roberts – lead guitar (2002–2005); bass (2011–2016)