ACE2 and COVID-19: The COVID-19 group showed significantly higher ROS levels, pro- and anti-inflammatory cytokines (IL-1β, IL6, IL-8, TNF-α, transforming growth factor-β (TGF-β), interferon (IFN-α, IFN-γ)), apoptotic variables (TUNNEL percentage; caspase-3, caspase-8, and caspase-9 activity), and semen ACE-2 enzymatic activity, as well as significantly lower superoxide dismutase (SOD) activity.