Figure 4. Individual antibody levels obtained at various time points after symptom resolution from 41 persons recovered from PCR-positive SARS-CoV-2 infection and with an initial nAb titer of 1:40 or greater.

The same 41 persons are represented in each graph. Red lines correspond to hospitalized participants (n = 7). Neutralization assay (A), Euroimmun (anti-S1) IgG assay (B), and Abbott (anti-NP) IgG assay (C) results as a function of time since resolution of symptoms. Each line connects 2 results from a single participant.