
Since the U.S. Food and Drug Administration approved seven-valent pneumococcal conjugate vaccine (PCV7) for children under age 5 in 2000, rates of invasive pneumococcal disease (IPD) have significantly declined in all age groups while rates of IPD caused by non-vaccine strains have increased modestly, according to research presented this week at the 2008 International Conference on Emerging Infectious Diseases in Atlanta.