Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Negative-stain electron micrograph of purified virions. The 70-nm particles exhibit icosahedral morphology with turret-like protrusions across the capsid. The particles display at least two layers, with ring-like structures surrounding each capsid.
