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Keep your distance from others in the building if possible to avoid further exposure to radioactive materials.Avoid touching your eyes, nose, and mouth, if possible.

Remove any contaminated clothing and wipe off or wash unprotected skin if you were outside during or after the fallout.Go into the basement or center of the building away from the outer walls and roof for optimal protection. Get inside the nearest brick or concrete building to avoid radiation.Shielding - Prevent direct exposure by using a barrier such as brick or concrete.Distance - Exposure can be reduced by getting further away from the source of radiation.Time - Radiation exposure can accumulate over time so it is important to reduce the amount of time you are exposed.That is enough time to prevent significant radiation exposure. It takes roughly 15 minutes or longer for the fallout to return to ground level, outside of the immediate blast zone. Fallout is most dangerous in the first few hours after the detonation when it is giving off the highest levels of radiation. Fallout is radioactive and can cause contamination of anything it lands on, including food and water supplies. It can be carried long distances by the wind and end up miles from the site of the explosion. Nuclear fallout is radioactive material from the nuclear device that mixes with the vaporized material in the mushroom cloud and cools, condenses, and then falls back to the ground. Aside from the death, injury, and damage caused at the blast site, nuclear fallout is also a concern. The weapons can range from small portable devices to large weapons carried by missiles. Intentional attacks are carried out by detonating weapons that use a nuclear reaction to create an explosion. Both can occur with very little or no warning at all and can have deadly effects, so it is important to be prepared. Nuclear incidents can be intentional attacks or accidents that occur during transport or at nuclear facilities. A nuclear incident is an event that includes a nuclear occurrence(s) causing bodily harm, sickness, disease, death, or loss of or damage to property, resulting from the radioactive, toxic, explosive, or other hazardous properties of radioactive material.