Now, what's the function of these interferons? Well, basically we have a bunch of healthy nearby cells shown in blue and we also have other wide blood cells that are in close proximity. For example, we have the natural killer cell and we also have aromacrophages which play a role in the innate immune response. So what these interferons do is they ultimately bind onto the membrane of these healthy blue cells and they prepare those cells for that viral infection. For example, they ensure that these blue cells, healthy cells begin to produce special types of proteins that essentially are antiviral proteins. They block viral replication from actually taking place.