This is what we know happened. On March 31, 2010, Park Ji-Yeon, who worked at Samsung’s On-Yang semiconductor plant in South Korea, died of leukemia at age 23. According to Korean news accounts, Park began working at the Samsung plant in 2004 and was diagnosed with acute myeloid leukemia in 2007.
And it was in 2007 that a 22 year-old woman named Yu-mi Hwang who had worked at Samsung’s Gijeung semiconductor plant since just before graduating from high school died – also of leukemia.2010-04-14-IMG_3909photoofSookyoungLee.JPG A year later, another woman who worked in the same plant in South Korea and shared a work bay with Yu-mi died, also of leukemia, at age 30. …
See here for the article in the Huffington Post by Elizabeth Grossman, “Were They Canaries? The Too Short Lives of Park Ji-Yeon and Yu-mi Hwang” – deaths in Samsung Semiconductor factories, due to leukemia.
http://www.huffingtonpost.com/elizabeth-grossman/were-they-canaries-the-to_b_536726.html