11. Released virions can be passed from host to host . . ." 12. During their normal life cycles, virions produce extracellular and intracellular proteins. 13. Tetherin aggregates virions and downmodulates the infectivity of the virions. 14. Tetherin aggregates virions and downmodulates the infectivity of the virions . 15. Dichorhaviruses have segmented genomes and their short bacilliform virions are not enveloped. 16. The cleavage occurs during the late stages of virion assembly. 17. VP4 is on the surface of the virion that protrudes as a spike. 18. Virions are ~ 300 nm in length and ~ 18 nm in diameter.19. The virion is spherical in shape with a diameter of about 100 nm. 20. The density of the virions is 1.18 gram per cubic centimeter.
