Shouldn't have read this thread on a Monday morning... It made my head spin
We have made Bio Attacks only "Deliverable" by Special Ops. If you initiate one and get caught that would be bad! If successful, it is our thought that a Bio attack would cause panic among the citizens, badly hurting that region's economy, and drastically increase the burden to a region's Health Care and Infrastructure. We assume that all the Bio agents in the game will not be so virulent that World Contamination would be possible. There may be a few "Random" consequences from Bio attacks, but we haven't really had that discussion yet.
BUT, as I indicated above, the risk of launching a Bio attack will be GREAT! If you are discovered to have instigated a BIO War, then the World Market will likely come down just as hard, if not harder, as they would if you had launched a Nuclear Attack. The economic and military consequences would not be pleasant