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. 2021 Apr 16;13(4):697. doi: 10.3390/v13040697

Figure 2.

Figure 2

Persistence of SARS-CoV-2 antibodies in resolved subjects based on time of blood collection post-symptom onset. Resolved subjects (n = 153) were grouped based on days post-symptom onset showing levels of (A) anti-S protein and anti-RBD IgG, (B) IgA, and (C) IgM displayed as dot plots. Days post-symptom onset were binned in 60-day increments and are compared to asymptomatic resolved subjects. Asymptomatic subjects were collected between 27 and 160 days after their RT-PCR test. Circles represent anti-S protein antibodies and squares represent anti-RBD antibodies. Anti-S protein IgG was found in all resolved participants collected between 60 and 120 days (23 of 153 total resolved subjects). In the resolved patients collected between 120 and 180 days from symptom onset, there was a decrease in the percentage of antibody-positive samples when compared to the previous time bin (55 of 60 samples, 91.7%).