Final answer:
Interferon is the protein that interferes with virus production by inhibiting viral replication and reducing the production of new virus particles.
Step-by-step explanation:
The protein that interferes with virus production is interferon. Interferons are a group of signaling proteins that are released by host cells in response to viral infections. They play a crucial role in limiting the spread of viruses by inhibiting viral replication and reducing the production of new virus particles.