Physical effects of this tear gas are felt almost immediately. They are: severe burning in the eyes, involuntary closing of the eyes, copious tearing, extreme burning in the nose, tendency to breathe through the mouth, extreme burning in the throat, coughing, consciousness of pain, holding of breath, breathing and heart rate slows down, blood pressure rises, circulation on the periphery of the body shuts down. In some cases there can be mucus secretion, nausea and vomiting, also burning sensations on the body in places touched by the hands. Recovery quickly follows after an affected person is immersed in fresh air. CS gas is not known to have caused any deaths or permanent injuries, however its use has been banned in some American military operations.