NEW YORK--(BUSINESS WIRE)--Pfizer Inc. (NYSE:PFE) announced today that additional data from several clinical studies of Prevnar 13®* (Pneumococcal 13-valent Conjugate Vaccine [Diphtheria CRM197 Protein]) conducted in adults 50 years and older will be presented during the 49th Annual Meeting of the Infectious Diseases Society of America (IDSA), which is being held Oct. 20-23, 2011, in Boston, Mass. The data from these studies provide support for the pending regulatory applications for the use of Prevnar 13 in adults 50 years and older to help prevent pneumococcal disease.