bacteria species living in the human gut makes sense to me. But what does it mean for a virus species to be located in the human gut? constantly reinfecting ne

bacteria species living in the human gut makes sense to me. But what does it mean for a virus species to be located in the human gut? constantly reinfecting new stomach cells as they are generated? infecting the bacteria in the gut? edit: I saw another comment recommending "I Contain Multitudes" so I figured I search it for "virus" (thanks libgen) and found this: "There are viruses too, in unfathomable numbers – a “virome” that infects all the other microbes and occasionally the host’s cells."