Of interest, we noticed that BMPs enriched in alveolar macrophages, i.e., BMP 38:5(18:1/20:4) (p = 0.0054) and BMP 38:6(18:2/20:4) (p = 0.0004), increased longitudinally with saturated CEs (CE 14:0, p = 0.0017; CE 16:0, p = 0.0092) from hospital admission to discharge in a small subset of patients who recovered from COVID-19 (Figure S2).