CD40LG and COVID-19: , –6 In symptomatic patients with COVID-19, anti-SARS-CoV-2 antibodies are produced and the antibody levels were different depending on the severity of disease7, –9; however, studies have shown that asymptomatic patients also develop the anti-SARS-CoV-2 humoral response10. ,11 Several studies have shown that most patients with COVID-19 produce IgM and IgG antibodies within 2 weeks of symptom onset12. ,13