Inhaling Smoke from a Smoke Grenade Poses Significant Health Risks and is Considered Hazardous — Smoke from crowd control irritants and commercial smoke grenades causes eye, nose, throat, skin, and lung irritation and can temporarily incapacitate large numbers of people Severe outcomes including respiratory failure and deaths have occurred after mass exposures, especially among people with asthma, heart disease, the elderly, children, and pregnant people Inhalation in confined or dense crowds in