Using 36 samples obtained from RT-PCR confirmed COVID-19 patients, Sacristan et al. reported that the detection percentage of IgG antibodies were similar in StrongStep SARS-CoV-2 IgG/IgM kit and AllTest COV-19 IgG/IgM kit (83.3%and 80.6%, respectively). The gene discussed is CD40LG; the disease is COVID-19.