Table 1.

Evidence supporting the clinical importance of routine assessment of anti‐severe acute respiratory coronavirus disease 2 (SARS‐CoV‐2) serum immunoglobulin A (IgA) titer in patients with suspected or confirmed coronavirus disease 2019 (COVID‐19)

1. Contribute to diagnosing acute SARS‐CoV‐2 infection in patients with negative or undetermined molecular biology

2. Enhance accuracy of anti‐SARS‐CoV‐2 serological assessment

3. Mirror development of mucosal humoral immunity

4. Predict disease progression and severity