(Historical Comparisons of Morbidity and Mortality for Vaccine-Preventable Diseases in the United States)[[Benutzer:Cohen|Cohen]] 15:45, 6. Jun. 2009 (CEST) | (Historical Comparisons of Morbidity and Mortality for Vaccine-Preventable Diseases in the United States)[[Benutzer:Cohen|Cohen]] 15:45, 6. Jun. 2009 (CEST) |