A group from San Martino Policlinico Hospital, Genoa, Italy, etc. has reported on characteristics of bronchoalveolar lavage fluid (BALF) collected from COVID-19 patients.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8049078/
BALF cellularity was mainly composed of neutrophils and macrophages (neutrophils were more abundant than macrophages). The median value of macrophage percentages was higher in non-survivors compared to survivors (35% vs 20%). However, we must be cautious that all the differences shown in a table below are not statistically significant.
