PT - JOURNAL ARTICLE ED - , TI - Q&A with WHO leader David Heymann: Healthier world requires U.S. leadership: Global health advocate highlights infectious disease challenges DP - 2009 Mar 01 TA - The Nation's Health PG - 11--11 VI - 39 IP - 2 4099 - http://www.thenationshealth.org/content/39/2/11.short 4100 - http://www.thenationshealth.org/content/39/2/11.full SO - Nations Health2009 Mar 01; 39