RT Journal Article SR Electronic T1 Q&A with infectious disease specialist William Schaffner: Preventing pneumococcal illness: Vaccines can prevent pneumococcal disease in all age groups JF The Nation's Health JO Nations Health FD American Public Health Association SP 7 OP 7 VO 41 IS 1 YR 2011 UL http://www.thenationshealth.org/content/41/1/7.abstract AB