In the blood test, the anti-COVID-19 immunoglobulin M (anti-COVID-19 IgM) and anti-COVID-19 IgG were measured 0.18 μg/mL and 0.04 μg/mL, respectively (The reference value of anti-COVID 19 IgM and IgG were described as negative: < 0.9; borderline: 0.9–1.1 or positive: > 1.1). The gene discussed is CD40LG; the disease is COVID-19.