The Application dimension of the Oligonucleotide Therapy-based Drug segmentation delineates demand across therapeutic indications. Oncology accounts for roughly 35% of market revenue, driven by the high unmet need for targeted gene‑silencing agents in solid tumours and hematologic malignancies. Rare genetic diseases represent the next largest slice at 30%, reflecting regulatory incentives and the ability of antisense and siRNA platforms to address single‑gene pathologies such as spinal muscular atrophy and transthyretin amyloidosis. Infectious diseases contribute about 20% of the market, as nucleic‑acid therapeutics are increasingly explored for viral suppression (e.g., hepatitis B, COVID‑19) and antimicrobial resistance. Cardiovascular applications, though still emerging, capture 10% of sales, primarily through antisense approaches to lower plasma lipids and modulate inflammatory pathways. The remaining 5% falls under Other categories, including ophthalmology and dermatology, where niche products generate incremental revenue. Collectively, these application segments shape the overall market size by allocating R&D funding, clinical trial capacity, and commercial focus in proportion to their projected economic impact.