COVID-19 pandemic continues, scientists worldwide continue to investigate the characteristics of the human immune response in fighting it.Seeking to expand on findings reported so far, and also to better connect immune features in COVID-19 patients with clinical features of disease, Mathew and his colleagues assessed the cells of the immune system in 125 COVID-19 patients at two points during their first week of hospitalisation.The researchers said they used a method called flow cytometry, which is a technique used to detect and measure physical and chemical characteristics of a population of cells, to assess the patient immune cells.They said the study also collected clinical data on the patient cohort.Combining the flow cytometric and.