CD40LG and COVID-19: Concerning the seroprevalence of IgM and IgG antibodies based on COVID-19 diagnosis and clinical symptoms, we found those who did not self-diagnose the disease had a higher IgM seropositivity [10.57% (95% CI: 7.88–12.59)] compared to those who did self-diagnose [5.24% (95% CI: 3.51–6.97)] (Table 3).