TABLE 1.

Antigenic analysis of 2020 Cambodian influenza A(H3N2) viruses by hemagglutination inhibition assay^a

^aYellow highlight indicates sera raised against the 2019 vaccine recommended strain. The purple indicates sera raised against the 2021 vaccine candidate. Green indicates sera raised against A/Darwin/726/2019, which is the cell-based equivalent of the 2021 WHO recommended Southern Hemisphere vaccine strain, A/Hong Kong/2671/2019. Gray indicates the human sera pool of individuals vaccinated with a quadrivalent vaccine containing a A/South Australia/34/2019-like A(H3N2) virus.