NEW YORK--(BUSINESS WIRE)--Pfizer Inc. (NYSE: PFE) announced today that the World Health Organization (WHO) has granted an expansion to the prequalification of Pfizer’s pneumococcal conjugate vaccine, Prevenar 131 (Pneumococcal polysaccharide conjugate vaccine [13-valent, adsorbed]), to include adults 50 years of age and older against pneumonia and invasive disease caused by the 13 pneumococcal serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) contained in the vaccine.
