A substance derived from the plant Ardisia crenata works in a different way than existing drugs. And in doing so, it is highly effective.
Merck stokes pneumococcal rivalry with Pfizer, revealing updated 21-valent vaccine data
Merck’s experimental 21-valent pneumococcal vaccine bested Pfizer’s Prevnar 20 for 10 of 11 serotypes unique to the new shot, according to a Tuesday data readout.