, Virion Size:
• Virions range in size from about 10 to 300 or 400 nm in
diameter.
• The smallest viruses are a little larger than ribosomes.
• whereas the poxviruses, like vaccinia, are about the same
size as the smallest bacteria and can be seen in the light
micro scope.
Structures:
1. Capsid (Icosahedral, helical, complex)
2. Envelope