A virus’s shape is dynamic and influenced by its environment, rather than being fixed by its strain, as was previously assumed. The study examined 16 different virus-cell combinations, which ...

It is a near sphere of protein (cross section shown) inside a fatty membrane that protects a twisting strand of RNA--a molecule that holds the virus's genetic code. Proteins called "S" form spikes ...

Are they a streamlined form of something that existed long ago ... We can become infected with a small number of virus particles — by inhaling particles expelled when another person coughs ...