ACE2 and COVID-19: Furthermore, although SARS-CoV-2 RNA was detected in the olfactory bulb in postmortem COVID-19 brain tissues (Lopez et al., 2022; Serrano et al., 2022), the samples always included the nervus terminalis neurons that express ACE2 (Bilinska et al., 2021; Butowt and von Bartheld, 2022).