Three papers by James Allison and Tasuku Honjo published in JEM between 1995 and 2000 crystallized seminal insights into the role of CTLA-4 and PD-1 in immunosuppression (Krummel and Allison. 1995. J. Exp. Med.https://doi.org/10.1084/jem.182.2.459; van Elsas et al. 1999. J. Exp. Med.https://doi.org/10.1084/jem.190.3.355; Freeman et al. 2000. J. Exp. Med.https://doi.org/10.1084/jem.192.7.1027). These papers laid the basis for modern cancer immunotherapy and led to a shared 2018 Nobel Prize.