Since the emergence of SARS-CoV-2, scientists have discovered more about the role of our immune systems and cytokine-associated processes responsible for systemic immune reactions that are typical in patients with COVID-19 (1). Flow cytometry is used to understand those processes at a single-cell level. It is the standard method used in immunology to characterize multiple phenotypic and functional parameters of single cells, including cytokine analysis. Despite advances in flow cytometry instrumentation, reagents, and analytical software, several challenges remain. Conjugated antibodies…