Colorized scanning electron micrograph of a cell heavily infected with SARS-CoV-2 virus particles (yellow), isolated from a patient sample. The black area in the image is extracellular space ...

This is a false color scanning electron micrograph of a T cell (green) on an array of clusters of T cell receptor ligands (not visible) bound to gold-palladium nanoparticles (gold, there are seven ...