Flow cytometry is undoubtedly one of the most powerful and important lab techniques needed for cell therapy work. We can use fluorescent markers to track how well viruses are transfecting cells with the genes needs to create CAR T cells. Cells can be labeled with a plethora of antibodies to get a precise characterization of cell type distribution in a sample. We can get a before-and-after screenshot of how a cell population responds to certain stimuli and how they differentiate, and we can also assess the health of cells and whether they’re proliferating or dying.