Cancer cells when treated with cisplatin, paclitaxel, gemcitabine, Mycobacterium w or combination there of shows altered protein profile. Thus altered protein profile has at least one protein commonly expressed or over expressed. The commonly expressed or over expressed protein induces immune response specific to cancer cells (homologue and hetrologus) of tissue/organ of origin. The immune response generated by administration of commonly expressed or over expressed antigen not reactive to normal cells and cancer cells or different tissue/organ of origin.