The Prevnar franchise is PFE’s biggest seller not related to COVID. In the adult segment of the market, Prevnar-20 has achieved a 97% market share with MRK’s Vaxneuvance a very distant #2 (#msg-169520866, #msg-166441188).
The pediatric segment of the pneumococcal-vaccine market figures to be more competitive since MRK’s Vaxneuvance has a head start from its FDA approval in Jun 2022 (#msg-169208458).
This is a pretty big deal for PFE insofar as it makes Prevnar-20 a source of incremental Prevnar-franchise revenue rather than merely a replacement for Prevar-13 sales.