Antibody that stops a virus from replicating by lysis (killing) of infected cells.

An antibody that prevents virus from infecting a cell, usually by blocking viral entry points (receptors) on the virus.

an antibody that exhibits neutralizing activity in a standard assay

a type of protein produced by B lymphocytes (see above) after stimulation by an antigen; such proteins bind to specific antigens in an immune response and usually counteract or inactivate antigens.