The ACE2 receptor that the virus targets is rare in the brain. But new research shows that the virus could enter brain cells via this method too.
Developing a treatment or vaccine for severe COVID-19 is currently the world's top public health priority.
COVID-19 research roundup: Mutant virus poses greater risk; why diseased lungs more susceptible; tackling sleep problems
Faced with health and economic anxiety during the coronavirus pandemic, many people are having trouble sleeping.