CD40LG and COVID-19: Figure 6 shows estimated sensitivity and specificity, together with associated confidence intervals for three commercially available tests, taken from the US Food and Drug Administration (FDA) website [62] (Tests A, B and C correspond to Abbott Architect SARS-CoV-2 IgG, Cellex qSARS-CoV-2 IgG/IgM Rapid Test, and Megna Health Rapid COVID-19 IgM/IgG Combo Test Kit, respectively).