For example, if we have some type of epithelial cell that is infected, for example, this cell, what the infected cell does is it displays an antigen on the membrane of that cell. And our gamma delta T cell can use the gamma delta T cell receptor to bind onto that antigen. And once bound, it basically begins to release special chemicals we call cytokines. And what these cytokines are believed to do is they carry out the following several functions. First of all, they begin the process of repairing these cells. They continue the process of immunosurveillance.