Epigraph Explanation explains the tool, its options and how to interpret your results.
Reference:
James Theiler, Hyejin Yoon, Karina Yusima, Louis J. Picker,
Klaus Frueh, and Bette Korber. Epigraph: A Vaccine Design Tool Applied to an HIV Therapeutic Vaccine and a Pan-Filovirus Vaccine. Sci Rep. 2016 Oct 5;6:33987. doi: 10.1038/srep33987. Pubmed: 27703185.