So, baby and placenta are both inside the uterus, with the placenta off to the the side inside and the baby or fetus or embryo also inside the uterus but at the center and up against the other side of the womb. The fertilized egg is the zygote.
Like many living things, viruses live to reproduce. They find a host cell, replicate themselves, and leave the host cell with all of their new copies. One method of reproducing and fleeing a cell is the lytic cycle. In a lytic cycle, the virus reproduces thousands to millions of times in just a few hours, then weakens the cell wall enough that the cell will lyse, or burst open, setting the army of new viruses free.
Lysis. Definition. noun. (cytology). The disintegration or rupture of the cell membrane, resulting in the release of cell contents or the subsequent death of the cell. (medicine). The gradual recovery or recuperation from an acute disease. (suffix: - lysis). Decomposition, breakdown or disintegration. Supplement.