Well, what happens is the infected cell begins to produce a biological molecule known as an interferon and we have many different types of interferons. So these purple molecules here are the interferon. So the infected cell begins to produce these interferons and the cell releases these interferons to the surrounding environment. 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.