FIGURE 1.

Serum antibodies against SARS‐CoV‐2 in dupilumab‐treated asthmatic and in two nondupilumab‐treated patients (one of whom was on inhaled steroid and the other steroid‐naïve nonasthmatic). The level of detection was determined using the optical density (OD) of pre‐COVID sera. Levels of antibody are determined for each antibody/antigen combination by determining a cutoff value (optical density + 2 standard deviations for pre‐COVID plasma), and optical density values are divided by this cutoff value. Levels above one are considered positive (dashed line). Dupilumab‐treated patient remained PCR positive for 9 wk, while the nondupilumab‐treated patients tested negative between 4 and 5 wk