the detection of virus-neutralizing antibody and high titres of neuraminidase-inhibiting antibody for hong kong/68 virus , and the production of precipitin lines corresponding to influenza a ribonucleoprotein and haemagglutinin and neuraminidase antigens of hong kong virus in immunodiffusion tests indicated that the swine sera contained antibody specific for the hong kong/68 virus .
C0475463
neutralizing antibody
C0003241
antibody