The unmentioned largest concentration of chemical weapons survivors

"It is estimated that more than 100,000 survivors of chemical warfare live in Iran, more than any other country." "There were more than 30 chemical attacks on residential areas in Iran, as well as on the Iraqi Kurdish town of Halabja, where more than 5,000 civilians were killed. Companies based in the UK, France, Germany, Spain, the US, India and Egypt were involved in selling and providing material for these chemical weapons to Iraq."