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Schematic illustration of rapid SARS‐CoV‐2 IgM‐IgG combined antibody test. A, Schematic diagram of the detection device; B, an illustration of different testing results; C, means control line; G, means IgG line; M, means IgM line. IgG, immunoglobulin G; IgM, immunoglobulin M; SARS‐CoV‐2, severe acute respiratory syndrome coronavirus 2
