The field of mathematical Biology is concerned with the application of mathematics to the solution of numerous problems in the biological sciences. One of many areas impacted by this reserch is improving the effectiveness of cancer chemotherapy. A noted researcher in this field is Dr. Trachette Jackson.
She obtained her undergraduate degree in math from Arizona State Univ. in Tempe. Her Ph.D. was in mathematical Biology. Five short years after obtaining that degree, she had a Sloan Fellowship and ten published articles.
Read more about Trachette Jackson here. You can read a 2007 interview here.
The Algorithmist 
she was my favorite person