Figure 2.

Box‐whisker plots depicting SARS‐CoV‐2 S receptor‐binding domain (RBD) total antibody levels as measured at 3 months following complete vaccination with the Comirnaty® COVID‐19 vaccine by the Roche Elecsys® Anti‐SARS‐CoV‐2 S (Roche Diagnostics, Pleasanton) in 49 nursing home residents testing negative by a lateral flow immunochromatography (OnSite COVID‐19 IgG/IgM Rapid Test; CTK BIOTECH) in whole blood obtained by fingerstick, either subsequently developing a breakthrough infection or not. The p value is shown for comparison. COVID‐19, coronavirus disease 2019; SARS‐CoV‐2, severe acute respiratory syndrome coronavirus 2