Pathogen was formed in the early days of January 2001, at the apocalyptic city of San Pablo, Philippines by Willie Desamero (Guitar/Vocals) with the idea of forming a death metal band which will play with the stylistic elements of the classic death metal bands from the late 80’s and early 90’s and will be combined by their various extreme metal influences of thrash, grind, black and doom to forge their own signature death metal sound. Willie then recruited band members, Alex Alfonso (Bass Guitar), and Allan Hernandez (Drums) and the first series of rehearsals and live gigs were initiated around their hometown. A second guitar player, Erwin Javier, was added three months later and the band worked on their first demo tape, “Invoking Disease” which was released in July 2001. It was a 3 song demo filled with simplistic guitar riffs and arrangements, highly influenced by early Tiamat and Celtic Frost. The band, then promoted the demo through the underground tape trading network. Although only about 40-50 copies of the tape were spread out, Pathogen was asked to participate in several compilation releases such as the Metal Havoc ‘zine compilation tape and Maelstrom 666 Compilation CD-r in Thailand, among others. After a period of inactivity in late 2001 to mid 2002, due to unstable line-up, the band finally recruited bassist Erikk Calabia and drummer Vic Jarlego and started working on songs for their next release, the infamous ‘Into The Subconscious Void’ demo, recorded and released in 2004, bolstering a much more stronger songwriting and musicianship. This demo CD-r was heavily circulated in the underground demo trading network which garnered them much acclaim by fans and fanzines alike. The demo was even re-released by Nihilistic Music Productions, Brazil on tape in 2005 and once again on CD-r with bonus live tracks by Canada’s Skull Fucking Metal Records in 2006 furthering Pathogen’s death metal plague onslaught.