There are 2 bands named Anthrax:
1) Anthrax is an American, New York City-based thrash metal band, who released its first full-length album in 1984. The band was one of the most popular bands of the 1980s thrash metal scene and are notable for combining metal with rap and hardcore music early on. They have sold over 10 million albums worldwide and are classified as one of the "big four" of thrash metal alongside Metallica, Megadeth, and Slayer.
Anthrax was formed in 1981 by guitarists Scott Ian and Danny Lilker. They found the name in a biology textbook and claimed it because it sounded sufficiently evil. Vocalist John Connelly (Nuclear Assault) joined, as did drummer Dave Weiss and a bassist named Kenny. Kenny was replaced very early on with Paul Kahn, who was found insufficient as well, so Danny Lilker took over on bass, and Greg Walls joined as second guitarist. Then Connelly and Weiss left, being replaced by Greg D'Angelo (White Lion) on drums, and after a series of vocalists (including Scott's brother Jason), they found Neil Turbin.
This lineup gigged frequently locally, featuring original songs like "Satan's Wheels" (a song about drugs), "Hunting Dogs", and more, and also covers by Iron Maiden, Judas Priest, Kiss, and more. The lineup recorded a NWOBHM-sounding demo in July, 1982. Greg Walls left in the summer of 1983, and his replacement was Bob Berry for a few gigs.