All viruses contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid. Some viruses are also enclosed by an envelope of fat and protein molecules. In its infective form, outside the cell, a virus particle is called a virion.
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Why are you shouting at them?
No, I can't stay here, I want to go at once.
Many, many years ago there lived a hermit in a dense forest.
Congratulations! said the Captain.
