Mary had always found ways to deal with the fact she couldn't read or write. Her husband used to deal with everything, but when he died she knew life would be ever more difficult.
A simple mistake understanding the dose for her medication put Mary in the hospital, and she knew that her embarrassment at not being able to read wasn't worth her life.
Find out more about Mary and people like her that have overcome low literacy later in life.
Video courtesy of Project Literacy