20-valent pneumococcal conjugate vaccine + tozinameran

This is a **combination vaccine** consisting of the **20-valent pneumococcal conjugate vaccine** (commonly known by the brand name **Prevnar 20**, which protects against 20 serotypes of *Streptococcus pneumoniae* by inducing antibody responses to bacterial polysaccharides conjugated to carrier proteins) and **tozinameran** (the active ingredient in **Comirnaty**, an mRNA-based COVID-19 vaccine encoding the SARS-CoV-2 spike protein to induce immunity against COVID-19)[1][4][6][9]. Each component acts through distinct mechanisms: the pneumococcal vaccine is a conjugate vaccine that activates the immune response against pneumococcal bacteria via T-cell dependent processes, while tozinameran provides protection against COVID-19 via induction of neutralizing antibodies and a cellular immune response against the spike protein.