Figure 1

Scoring examples of ACE-2 (upper row) and TMPRSS-2 (lower row) in lung alveoli (A) and lung bronchioli (B). From left to right: Score = 1 (low immunoreactivity), score = 2 (moderate immunoreactivity), score = 3 (high immunoreactivity). Only membranous staining was evaluated. ACE-2, angiotensin-converting enzyme 2; TMPRSS-2, transmembrane protease serine 2.