In the literature, different explanations exist for these gender-related differences: The higher expression levels of the angiotensin-converting-enzyme-2 (ACE2) and lower levels of pro-inflammatory cytokines (i.e., interleukin-6) in women after viral infections could explain their higher susceptibility to developing olfactory and gustatory post-COVID symptoms [30,31]. Here, ACE2 is linked to viral infectious disease.