Fig. 1From: COVID-19 and cognitive impairment: neuroinvasive and blood‒brain barrier dysfunctionPotential routes of SARS-CoV-2 entry into the brain via the olfactory pathway. Once SARS-CoV-2 is inhaled into the nasal cavity, the virus spreads to the central nervous system along the retrograde axons of the olfactory nerve via the olfactory epithelial receptors ACE2 and TMPRSS2Back to article page