+An **animal virus** is a microscopic agent that replicates within the living cells of [Animals](/wiki/animal). These tiny entities, often a strand of [DNA](/wiki/dna) or RNA, hijack host cell machinery for their own propagation, frequently leading to disease.
+## See also
+- [Virus](/wiki/virus)
+- [Infection](/wiki/infection)
+- [Pathogen](/wiki/pathogen)
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