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. 2021 Sep 21;12:707977. doi: 10.3389/fimmu.2021.707977

Figure 2.

Figure 2

Immunization strategies and antibody responses in mice. (A) Scheme of immunization and sampling. Serum samples were collected 2 weeks after each immunization. Each immunogen plus with Freund’s adjuvant by subcutaneous (s.c.) injection for the immunizations at 0, 14, and 28 dpi. The mice with the highest antibody titers in each group were given the 3rd boost by intravenous (i.v.) injection at 42 dpi for mAbs preparation. (B) Titers of serum samples at 14, 28, and 42 dpi were detected by ELISA. Data was shown as mean ± SEM. ***p < 0.001. Graphs were made in GraphPad Prism version 8.0.2.