In a recent report, it was discovered that the CCR5 ligands CCL3 (macrophage inflammatory protein (MIP)‐1) and CCL4 (MIP‐1) are both considerably raised in BAL fluid of patients with idiopathic pulmonary fibrosis and have an essential impact in animal models of lung fibrosis.36, 37. Here, CCL3 is linked to pulmonary fibrosis.