Buy large: 4000x5500 = 13.33" × 18.33" @ 300 dpi

Ebola virus under microscope, high resolution. Artist’s concept
Ebola virus [ EBOV, formerly designated Zaire ebolavirus] is one of five known viruses within the genus Ebolavirus. Four of the five known ebolaviruses, including EBOV, cause a severe and often fatal hemorrhagic fever in humans and other mammals, known as Ebola virus disease [..]
The overall cylinders are generally approximately 80 nm in diameter, and have a virally encoded glycoprotein [GP] projecting as 7-10 nm long spikes from its lipid bilayer surface. The cylinders are of variable length, typically 800 nm, but sometimes up to 1000 nm long. The outer viral envelope of the virion is derived by budding from domains of host cell membrane into which the GP spikes have been inserted during their biosynthesis. Individual GP molecules appear with spacings of about 10 nm
Ebola virus. [2015, March 7]. In Wikipedia, The Free Encyclopedia. Retrieved 14:41, March 21, 2015, from http://en.wikipedia.org/w/index.php?title=Ebola_virus&oldid=650229182