(CNN)Here's some background information about sarin, a man-made nerve agent developed for chemical warfare.
Mild or moderately exposed people usually recover completely. Severely exposed people are not likely to survive.
Small, pinpoint pupils
Drooling and excessive sweating
Nausea, vomiting, and/or abdominal pain
Slow or fast heart rate
Loss of Consciousness
Respiratory failure possibly leading to death.
Leave the area of contamination as quickly as possible. Seek fresh air if exposure occurs indoors. If exposure is outdoors, head to higher ground as sarin is heavier than air and sinks.
1938 - Sarin is developed in Germany as a pesticide.