Major Flu Vaccine Antigen (IMAGE)

University of Pennsylvania School of Medicine

Major Flu Vaccine Antigen

Caption

The major flu vaccine antigen, hemagglutinin, is shown. Colored in dark blue is a region of the vaccine that differs between the current egg-grown H3N2 vaccine strain and circulating H3N2 viral strains.

Credit

Zost et al, <i>PNAS</i>, 2017

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