According to the latest report by IMARC Group, that the global cell-based assay market size reached US$ 18.9 Billion in 2021. Cell-based assay or cellular assay is an analytical method to determine the concentration of a substance by observing its effects on living organisms (in vivo) or tissues (in vitro). It provides a closer representation of the real-life model, which helps to verify the biological activity of drugs and determine whether the antibodies produced by the patient are neutralizing the drug.