CCL2 is a pro-inflammatory chemokine that is induced during several human acute and chronic viral infections, including human immunodeficiency virus (HIV) [39], hepatitis C virus [40], Epstein–Barr virus [41], respiratory synctitial virus [42], Severe Acute Respiratory Syndrome (SARS) [43], herpes simplex virus-1 [44], and Japanese encephalitis virus [45]. The gene discussed is CCL2; the disease is severe acute respiratory syndrome.