Interferons are antiviral proteins produced in response to viral infections or immune triggers. Which of the following statements is correct regarding interferons?

• A. They directly kill viruses.
• B. They stimulate the production of antibodies and help control the spread of viral infections.
• C. They protect uninfected cells by creating an antiviral state in uninfected cells by triggering a signaling pathway that activates gene-producing antiviral proteins.
• D. They are secreted by all immune cells except macrophages and dendritic cells.

Answer: (C)