Potential Antigenic Mismatch of the H3N2 Component of the 2019 Southern Hemisphere Influenza Vaccine.

Gouma, Sigrid; Weirick, Madison; Hensley, Scott E · Clin Infect Dis · 2020

basic_science · Level V

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Abstract

Here, we find that the egg-adapted H3N2 component of the 2019 Southern Hemisphere influenza vaccine elicits an antibody response in ferrets that is highly focused on antigenic site A of hemagglutinin. This is potentially problematic as most H3N2 viruses currently circulating in the Southern Hemisphere possess antigenic site A substitutions.

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