Researchers from US published images of the infectious form of SARS-CoV-2, virus that causes COVID-19. They inoculated SARS-Co-V-2 virus into human bronchial epithelial cells in a laboratory setting which were examined 96 hours later using scanning electron microscopy. A higher power magnification image shows the structure and density of SARS-CoV-2 virions (red) produced by human airway epithelia.