CCL4 and COVID-19: We determined the plasma levels of an array of chemokines (CC chemokines—CCL2, CCL3, CCL4, CCL5, CCL11, CCL19, and CCL20; CXCL chemokine—CXCL1, CXCL2, CXCL8, CXCL10, and CX3CL1) in children and elderly COVID‐19 individuals.