Now, vaccines are found inside the cytoplasm of our cell. And the functionality, the shape and size of vaccines depends on the type of cell that we are examining. So let's begin by examining plant cells. So, in plant cells, the vacuums serves three important purposes. One, it basically stores the water that is used by the cell. Two, it creates and maintains the hydrostatic pressure, the turtle pressure that gives the plant cell its ability to resist forces as well as pressure.