Figure 5. Decreased number of alveolar type II cells in the lungs of COVID-19 patients. (A, B) Representative images of prosurfactant protein C (pro-SPC) immunostaining, a marker of alveolar type II cells (ATII) (A) and quantification of pro-SpC positive cells in the lungs of control and COVID-19 patients (B) Statistical significance was assessed using Student’s t test and the p-value is indicated.