I don't have a source. Antibodies are largely used against bacterial infections. Viruses are usually seen as foreign but don't usually initiate a significant antibody response. Antibodies are on the outside of cells. Viruses attach themselves to cells, further masking against antibodies. As once they attach they are usually seen as the cell to which they attached. They then enter your cells where antibodies can't reach. Our bodies have entirely different system for defending against viruses. While antibodies may play a small role during initial infection, they are never a significant front line against viruses. The other mechanism identifies malfunctioning (infected) cells and terminates that cell as well as stops replication. Then, once dead, the white blood cells extract them for removal from the body.