SARS-CoV-2, the virus that causes COVID-19, may preferentially use a "back door" into cells to infect the brain, a new mouse study suggests.
The finding could partly explain why many people have neurological symptoms such as fatigue, dizziness, brain fog, or loss of smell or taste during or after a bout with the virus. Scientists think these symptoms may arise when SARS-CoV-2 enters the central nervous system, but how and why the virus moves from the respiratory tract to the brain wasn't clear until now.
