The Types segment of the Polyvalent Streptococcus Pneumococcal Vaccines market is organized around three core vaccine platforms: conjugate vaccines, polysaccharide vaccines, and emerging protein‑subunit formulations. Conjugate vaccines, which link pneumococcal polysaccharides to carrier proteins, dominate the market because they elicit T‑cell‑dependent immunity and support booster dosing; sub‑categories include 10‑valent, 13‑valent, and the newer 15‑ and 20‑valent conjugates, each expanding serotype coverage. Polysaccharide vaccines, primarily the 23‑valent formulation, remain relevant for adult and elderly populations lacking prior conjugate exposure, but their utility is limited by a lack of immunological memory. Protein‑subunit candidates, still in clinical development, aim to provide broader serotype independence and simplified manufacturing; they are classified by antigenic composition such as pneumococcal surface protein A (PspA) or pneumolysin derivatives. This market taxonomy clarifies how each type contributes to total sales, with conjugates driving the bulk of growth, polysaccharides sustaining legacy demand, and protein‑subunits representing future pipeline potential.