They reported that the anti-COVID-19 IgM and anti-COVID-19 IgG blood concentration levels peaked about 18 and 23 days post symptom onset, and then anti-COVID-19 IgM decreased to baseline level at about day 36, whereas anti-COVID-19 IgG remained at a high blood concentration level for a quite long period [8]. The gene discussed is CD40LG; the disease is COVID-19.