a close up of a red and blue substance

Produced by the National Institute of Allergy and Infectious Diseases (NIAID), in collaboration with Colorado State University, this highly magnified, digitally colorized scanning electron microscopic (SEM) image, reveals ultrastructural details at the site of interaction of two spherical shaped, Middle East respiratory syndrome coronavirus (MERS-CoV) viral particles, colorized blue, that were on the surface of a camel epithelial cell, colorized red.