![Epidemiology of Invasive Pneumococcal Disease in Southern California: Implications for the Design and Conduct of a Pneumococcal Conjugate Vaccine Efficacy Trial]()
Epidemiology of Invasive Pneumococcal Disease in Southern California: Implications for the Design and Conduct of a Pneumococcal Conjugate Vaccine Efficacy TrialKenneth M. Zangwill, Constance M. Vadheim, Ann M. Vannier, Leslie S. Hemenway, David P. Greenberg and Joel I. Ward · The Journal of Infectious Diseases · 1996