In total, 182 serum samples from individuals after total immunization were tested, and 174 only had C-line coloration, indicating that the vaccine induced the production of NAbs in vivo (Figure 5D, Supplemental Table 3 and Supplemental Figures 18C21); however, the level of NAbs generally decreased after 6 months (Number 5E and Supplemental Number 22)

In total, 182 serum samples from individuals after total immunization were tested, and 174 only had C-line coloration, indicating that…