a yellow substance with red dots in it

Produced by the National Institute of Allergy and Infectious Diseases (NIAID), this highly magnified, digitally colorized transmission electron microscopic (TEM) image highlights the particle envelope of a single, spherical shaped, Middle East respiratory syndrome coronavirus (MERS-CoV) virion, through the process of immunolabeling, the envelope proteins, using rabbit HCoV-EMC/2012 primary antibody, and goat anti-rabbit 10nm gold particles.