CD14 and COVID-19: They recreated lung-on-chips in which CD14+ cells could beadded to the human alveolar epithelial cells to study the immune systemresponse. The device was composed of two channels separated by a PDMSmembrane. The comparison was made of the differences between alveolarepithelial cells and vascular endothelial cells when SARS-CoV-2 infectionwas induced.