And this stage, this phase is known as the doorman period. Now of course eventually we can have some type of environmental factor that can cause the cell to basically undergo the Litig cycle. For example, UV radiation is one form of environmental factor that can basically take a cell under the lythogenic cycle and transform it into the lytic cycle, forced it to go into the lytic cycle and produce many different viruses and eventually lice. So a cell whose genome contains a viral DNA section inside that cell is known as a provirus. So these are the two types of cycles of pathways that can be followed by our cell once the virus actually ingests itself or injects the nucleic acid into that whole cell. A specific type of virus that only infects and targets bacterial cells is known as the bacteria phase and this usually undergoes the Litig cycle.