CXCL12 and viral infectious disease: Other immune response representative genes such as cytokines (CXCL14, CCL26, CCL24, CXCL12, and CXCL19) that participate in immunocyte recruitment (e.g., neutrophils) or are responsible for the host defense against viral infection, enhancing immune progression and metastasis (Fajgenbaum and June, 2020; Wu et al., 2020), of which are CCL24/CCL26, the role of eotaxins (Provost et al., 2013), are enriched in venule ECs and majorly distributed in the head/abdomen skin regions, respectively.