Fig. 1From: COVID-19 and aerobic exercise: possible role of angiotensin converting enzyme 2Possible mechanism of contamination by SARS-CoV-2 during endurance exercise within urban environment in presence of pollutants or bioaerosols. ACE2: angiotensin converting enzyme 2; PM2.5: fine particles (particulate matter) of diameter ≤ 2.5 μmBack to article page