Cancer therapy is not only the largest drug market by a wide margin, but it’s also the fastest growing. Specifically, EvaluatePharma expects cancer drug and therapy sales to rise at a compound annual growth of 12.7% over the course of 2016 to 2022. Interestingly enough, the bulk of this growth is forecast to stem from the red-hot area known as immuno-oncology (I-O), or therapies designed to enlist a patient’s own immune system in the battle against cancer.