Daley was born and raised in Massachusetts. She worked as an emergency room nurse for many years until sustaining a needlestick injury on the job in 1998 while working at Brigham and Women's Hospital. Daley had drawn blood from a patient and when she disposed of the needle in a sharps container, she was stuck by another needle that was wedged in the container. A few months later, Daley tested positive for HIV and hepatitis C.[1][2]
In 2010 and 2012, she was elected to two-year terms as president of the American Nurses Association, where she had previously served on the board of directors.[4] She is on the board of trustees for the Dana Farber Cancer Institute, the American Nurses Foundation, The International Safety Center and the Barnstable Land Trust.[6][7] In 2013, she was named to the Modern Healthcare Top 25 Women in Healthcare for 2013.[8]