- last post: 01.01.0001 12:00 AM PDT
No, the Grunts and Jackals can and do get infected by the Flood. Their physical structure isn't suitable for combat however, so they're made into the bases of Carrier Forms. Injured Combat Forms also take this role, although the Grunts and Jackals are used for it more often.
EDIT: Dang, postsniped.
[Edited on 7/18/2006]