Estimations state that the earth's virome count more virus particles than bacterial cells, and most of those viruses are bacteriophages.
An infectious agent known as a virus is a microscopic organism that reproduces inside the cells of living hosts. The host cell is compelled to create thousands of identical clones of the original virus quickly after infection.
Viruses don't have dividing cells like the majority of biological things do; instead, they form new viruses inside the infected host cell. However, they have genes, unlike more basic infectious agents like prions, which enable them to evolve and mutate. Out of the millions of virus species in the environment, more than 4,800 have been thoroughly described.
Their origin is unknown; some may have originated from bacteria, while others may have come from plasmids, which are DNA fragments that can migrate between cells.
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