Fig. 2: Effects of sex steroid hormones on SARS-CoV-2 susceptibility.
From: Sex hormones in SARS-CoV-2 susceptibility: key players or confounders?

Effect of testosterone (upper part), progesterone (middle part) and oestradiol (lower part) on virus entry receptors (left), immune responses (middle) and coronavirus disease 2019 (COVID-19) course (right). ACE2, angiotensin-converting enzyme 2; TMPRSS2, transmembrane protease serine 2; TH, T helper cell; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.