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. 2021 Jul 28:NEJMoa2109072. doi: 10.1056/NEJMoa2109072

Figure 3. Correlation between Neutralizing Antibody Titer and N Gene Cycle Threshold as Indication of Infectivity.

Figure 3

The results of antigen-detecting (Ag) rapid diagnostic testing for the presence of SARS-CoV-2 are shown, along with neutralizing antibody titers and N gene cycle threshold (Ct) values in 22 fully vaccinated health care workers with breakthrough infection for whom data were available (slope of regression line, 171.2; 95% CI, 62.9 to 279.4).