The Well-Intentioned Virus is the tenth studio album by American metalcore band Zao, released on December 9, 2016. The album features the first studio performance of Russ Cogdell for the first time since 2004's The Funeral of God. The album was released digitally, as well as on CD, vinyl and cassette. On December 1, 2016, the band streamed the whole album.

Zao is an American metalcore band founded in Parkersburg, West Virginia, and later relocated to Greensburg, Pennsylvania. Founded in March 1993, Zao has hosted several musicians and endured numerous roster changes to the point where no original members remain. Former drummer Jesse Smith, vocalist Dan Weyandt, and guitarists Scott Mellinger and Russ Cogdell are seen by some fans as the "core" of Zao, with the current line up being the longest running in the band's history.