The research, published in the journal Nature Neuroscience, noted that SARS-CoV-2 not only affects the respiratory tract but also impacts the central nervous system (CNS), resulting in neurological symptoms such as loss of smell, taste, headache, fatigue and nausea.

source https://zeenews.india.com/world/novel-coronavirus-may-enter-brain-via-nose-study-2327699.html