A is a non-cellular infectious agent that can only replicate within a host organism. They can infect any organism made of at least one , including bacteria, plants, fungi, algae and animals. All are very small, and have a very simple structure. When independent of its host, a particle usually only consists of genetic material, contained within a shell called a capsid.

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Virus Rona GIF by Squirrel Monkey

Word Bank:

virus, host, cell