Since the introduction of the pediatric 7-valent pneumococcal conjugate vaccine PCV7 in 2002, the rate of invasive pneumococcal disease has decreased significantly in the United States, according to the Centers for Disease Control and Prevention.
Con la introducción de la vacuna conjugada infantil 7-valente PCV-7, en el 2002, la tasa de enfermedad invasiva se redujo notablemente en los EUA, según informó el Center for Disease Control and Prevention.