The American Journal of Public Health published by the American Public Health Association since 1911 reports an increased impact factor for 2009. The 2009 impact factor for AJPH is 4.371 up from 4.241 in 2008. The journal ranks #2 out of 95 titles in the Public, Environmental and Occupational Health category of the 2009 Thomson Reuters Social Sciences Citation Index compared to last year’s #3 of 76 titles. It ranks #9 of 122 titles compared to last year’s #10 of 105 in the same category in the Science Edition. The journal is listed as one of the 100 most influential journals in biology and medicine over the last 100 years by the Special Libraries Association. For more information on the journal visit