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. 2022 Aug 26;22:709. doi: 10.1186/s12879-022-07695-7

Fig. 2.

Fig. 2

The correlation between the logarithmic values of anti-spike antibody titres [log (S Ab)] at one and seven months after vaccination. The correlation was positively significant in participants with negative antibody titres for nucleocapsid protein [N Ab (−)] at seven months after vaccination (n = 617, blue circles), but was negatively significant in those with positive antibody titres [N Ab (+)] (n = 19, orange circles)