Evidence also suggests that when people are infected with some severe respiratory viruses (such as SARS-CoV, H5N1), neutrophil infiltration into the lungs will produce high levels of chemokines, such as C-X-C motif chemokine 10 (CXCL10), which can induce fulminant pneumonia and aggravate the ARDS [34]. This evidence concerns the gene CXCL10 and acute respiratory distress syndrome.