Chua et al. performed single‐cell analyses of nasopharyngeal and bronchial samples from COVID‐19 patients and showed that elevated ACE2 expression is correlated with IFNG expression, and showed that these samples exhibit higher expression levels of CCL2, CCL3, CCL20,CXCL10,IL8 and IL1B genes in patients with severe disease, which could promote T‐cell recruitment.30 Here, ACE2 is linked to COVID-19.