The global cancer gene therapy market is projected to grow from USD 1,822.2 million in 2024 to USD 3,142.2 million by 2034, driven by increased R&D funding, rising cancer prevalence, and favorable government regulations. Oncolytic virotherapy, a key segment, generated USD 850.7 million in 2023. The market is shifting towards personalized, targeted therapies, reducing side effects and improving outcomes.