These symptoms are less frequent in COVID-19 and, when they occur, they do not accurately reflect the level of olfactory impairment.33The symptoms may also result from potential injury to or death of olfactory neurons or cells in the olfactory bulb; however, since most people who experience loss of smell due to COVID-19 recover quickly, this is less likely, because olfactory neurons lack angiotensin-converting enzyme 2 (ACE2) receptors, which enable viral entrance into cells. Here, ACE2 is linked to COVID-19.