We also combined RNA-, TCR-, and CITE-seq of peripheral blood T cells from patients with COVID-19 and bacterial pneumonia and yielded a sufficient number of CD4+, CD8+, and innate-like T cells for further clonal and expression analyses, allowing for a detailed comparison of peripheral and lung-specific T cell responses (Fig. 1, F and G, and fig. The gene discussed is CD4; the disease is COVID-19.