Merck already sells an older pneumococcal vaccine called Pneumovax 23, which protects against 23 strains but is a polysaccharide based shot, so doesn't stimulate as strong an immune response as ...

Prevnar 20 and Prevnar 13, brought in $6.4 billion in revenue in 2023, more than all but two other Pfizer products. Merck ...

Merck sells an older pneumococcal vaccine called Pneumovax 23, which protects against 23 strains but is a polysaccharide based shot and doesn't stimulate as strong an immune response as the ...