Henrietta Lacks’ life was cut tragically short when she died of cervical cancer at the age of 31 in 1950s Maryland. But in a way, she lived on. Cancer cells from her body have been used by researchers for decades. The HeLa Cells, as they’re called, have been distributed around the world, contributing to tens of thousands of studies and disease treatments. This year is the 70th anniversary of her death, and on Wednesday, the World Health Organization is honoring Lacks’ global impact. The World’s Marco Werman speaks to Rebecca Skloot, author of the book, “The Immortal Life of Henrietta Lacks.”