ISI Thomson-Reuters has just released the latest Impact Factor numbers (2010 data). Amongst virology eponymous journals, Retrovirology (based on Impact Factor) now leads the pack. In the latest ranking, Retrovirology ranks at 443 out of 8005 journals indexed by ISI for Impact Factor. By comparison the Journal of Virology ranks at 454. Retrovirology’s Impact Factor and Immediacy Index are both slightly ahead of those for the Journal of Virology and well-ahead of Virology. The Retrovirology numbers also compare very favorably to two stalwarts of journal publishing, the Journal of Biological Chemistry and the Journal of Molecular Biology.