Herpesviruses steal one cell's protein, use it to infect another
One of the defining features of viruses is that they rely on host proteins in order to reproduce. A host cell will often copy viral genes into RNAs and then translate those RNAs into proteins, for example.
https://arstechnica.com/science/2021/11/herpes-viruses-steal-one-cells-protein-use-it-to-infect-another/