The Types segment classifies injections by their delivery platform and molecular class, each contributing distinctively to market dynamics. Viral vector injections, exemplified by onasemnogene abeparvovec, leverage adeno‑associated viruses to deliver functional SMN1 genes, commanding premium pricing due to complex manufacturing and regulatory pathways. Non‑viral vector systems—such as lipid nanoparticles—offer a lower‑cost alternative with scalable production, appealing to emerging biosimilars. Antisense oligonucleotide (ASO) products, like nusinersen, employ short synthetic strands to modulate SMN2 splicing, representing a mature, high‑volume sub‑type with established reimbursement frameworks. Small‑molecule injections, still in early clinical stages, aim to enhance SMN protein stability and could diversify the pipeline. Collectively, these sub‑types shape the market taxonomy: viral vectors drive high‑margin growth, non‑viral vectors expand volume, ASOs sustain the core revenue base, and small molecules signal future diversification.