Function of the blood-brain barrier The blood-brain barrier separates brain tissue from the circulation and plays an important role in protecting the brain from pathogens and toxins. Generally, only small, lipid-soluble molecules pass freely through it. However, the blood-brain barrier [...]

Coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has emerged as the most important viral disease of zoonotic origin already directly affecting more than 109 million and causing more than 2,4 million deaths as of [...]

The virus that causes COVID-19, SARS-CoV-2, is a type of coronavirus, a large family of viruses named for the crown-like spikes on their surfaces. SARS-CoV-2 is a large RNA virus made up of around 30,000 nucleotides. A feature of RNA [...]