Dr. Jamal A. Khan and Dr Sharmin Yaqin are leading cancer Immunotherapists in India, who introduced the concept of customised treatment in cancer, cell-based treatments, and cancer Immunotherapy through Denvax clinics. Together they pioneered work in cancer immunotherapy when the word Immunotherapy was unheard of, even amongst doctor communities. For a good 10 years they struggled with explaining this treatment to patients as well as medical professionals.