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Left side is a representative western blot showing IgY from adjuvant-only immunized eggs (Lane A) and from eggs that were immunized with SARS-CoV-2 RBD. The anti-RBD IgY antibody specifically binds to the RBD protein (Lane B). Right side shows the SDS-PAGE of recombinant RBD (Lane C) (molecular weight 26 kDa).
