Iodine-131 is used in cancer treatment so there may be a leak from pharmaceutical company. [0] The similar case was observed in 2011 when the some I-131 isotop

Iodine-131 is used in cancer treatment so there may be a leak from pharmaceutical company. [0] The similar case was observed in 2011 when the some I-131 isotopes leaked from the laboratory in Budapest. [1] [0]: https://motherboard.vice.com/en_us/article/nobody-is-sure-what-caused-a-mysterious-radiation-spike-across-europe https://motherboard.vice.com/en_us/article/nobody-is-sure-wh... [1]: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0172312 http://journals.plos.org/plosone/article?id=10.1371/journal....