In a study involving 82 confirmed COVID-19cases and 58 suspected COVID-19 cases from China, the median duration of IgM testing was 5 days after the onset of symptoms (quartile range 3–6 days), and the median of IgG test was 14 days after the onset of symptoms (quartiles 10–18 days).[13] Since the outbreak and spread of COVID-19 is rapid, there is no data on long-term immune response. The gene discussed is CD40LG; the disease is COVID-19.