Digital PCR (dPCR) is an excellent tool for rare target analysis applications because, unlike traditional PCR methods, dPCR divides samples into thousands of individual microreactions, then amplifies isolated molecules to endpoint. This helps to isolate even very small amounts of target for improved chances of detection and quantification. For applications such as CAR-T cell therapy research, where the frequencies of targets are often very low, dPCR is an extremely advantageous tool.