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SARS-CoV-2-specific antigen test (ESPLINE SARS-CoV-2®, Fujirebio Inc.) results for this case at 1.5 months after onset. The figure on the right is an enlargement of a part of the kit. The r line is the reference line, and the T line is the judgment line. Because the judgment line was thinner and lighter than the reference line, we judged it weakly positive.
