[Name] Gagne [Source] Michigan: Report from Hell [Symptoms] 
An experimental bioweapon that was developed in a consortium by the ZaKa Conglomerate, the U.S. Government, and the U.S. Military. It is a mutagenic virus that can be transmitted in the air and by contact with body fluids. Gagne takes the form of a thick fog that has covered the entirety of Chicago, Illinois and is causing animals and people to horrifically transform into grotesque monsters with large maws that can spawn leech-like larvae. Stage 1: No discernible changes in physical appearance and body temperature. Actions become sluggish. Stage 2: Subject begins to spawn leech-like larvae which are violently spewed from the mouth. Stage 3: Subject undergoes horrific transformation and becomes aggressive and sensitive to nearby sounds.