NCIt definition : An in vitro assay that is used to determine whether antibodies present in serum samples
will prevent hemagglutination in a cell culture plate containing red blood cells and
influenza virus.;
Alternative definition : CDISC: An in vitro assay that is used to determine whether antibodies present in serum
samples will inhibit hemagglutination in a cell culture plate containing red blood
cells and a hemagglutinating agent.;