Final answer:
Interferons are proteins released by infected cells to protect uninfected cells from viral infections. They stimulate uninfected cells to produce compounds that interfere with viral replication.
Step-by-step explanation:
Interferons are proteins released by infected cells to protect uninfected cells from viral infections. They stimulate uninfected cells to produce compounds that interfere with viral replication. Interferons also activate immune cells. The production of interferons is stimulated by viral infections.
The cells of the body that secrete interferons are infected cells. When a virus infects a cell, it releases interferons as a warning to nearby uninfected cells.