Porcine xenotransplantation research was halted in the 1990s because of the risk of transmitting porcine endogenous retrovirus (PERV) to patients during organ transplants. To help resurrect the field, genomic pioneer George Church, PhD, and researcher Luhan Yang, PhD, co-foundeed eGenesis, a company devoted to developing human-compatible organs, tissues, and cells. eGenesis is working to make porcine tissue PERV-free and as human-like as possible to enable life-saving medical interventions.