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. 2024 Jul 21;25(14):7976. doi: 10.3390/ijms25147976

Figure 1.

Figure 1

Immune response of chickens and rabbits following immunization with three different SARS-CoV-2 antigen preparations, the RBD antigen (SARS-CoV-2 receptor-binding-domain coupled to LS-particles), the S1 antigen (S1 subunit of the SARS-CoV-2 spike protein coupled to LS-particles) and an inactivated SARS-CoV-2 full-virus preparation. (A) The immunization and sampling scheme for the different antigens. (B) All sera (dilution factor 1:100) from immunized chickens and reference rabbits were tested by RBD-specific ELISA, and samples from animals immunized with the full-virus preparation were also tested with N-specific ELISA. The mean with SEM of individual animals is depicted for the sera. (C) Yolk samples of the chicken were analyzed by RBD-specific ELISA and for the whole-virus group with the N-specific ELISA, in addition. The single values for the weekly yolk-pool samples are shown.