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. So when this infected cell actually lyses it breaks open and releases the newly formed viruses. And these viruses eventually make their way to these healthy cells. These nearby healthy cells have already mounted a defense and are ready for that viral attack.