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. 2022 Jan 19;40(8):1162–1169. doi: 10.1016/j.vaccine.2022.01.007

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Fig. 5 — Kinetics of anti-RBDf IgG titers in vaccinated mice. Immunized animals were bleed every seven days and titers against RBDf were determined by ELISA. The chart shows the mean of titer plus standard deviations of each group, by bleeding day. Red arrow: bleeding days; Black arrow: dose day. SC: subcutaneous; IN: intranasal; MIX: simple mixture.