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Table 1 The hemagglutinin inhibition assay (HI) between AH/17 and FJ/20

From: The molecular determinants of antigenic drift in a novel avian influenza A (H9N2) variant virus

Virus

HI titera

Anti-A/Anhui/LH99/2017

Anti-A/Fujian/11/2020

A/chicken/Anhui/LH99/2017(AH/17)

2048

128

A/chicken/Fujian/11/2020(FJ/20)

128

2048

  1. aChicken vaccinated serum against AH/17 or FJ/20 was tested with the two viral antigens by the HI assay. The HI titer (averaged from two animals for anti-FJ/20) was the reciprocal of the highest serum dilution that inhibited hemagglutination