CD40LG and COVID-19: Based on the presence of IgM, IgG, or both, the sensitivity and specificity of the PanbioTM COVID-19 IgG/IgM rapid test device for the diagnosis of COVID-19 in patients from Cohort 1 and Cohort 2 were 60.7% and 100%, and 77.5% and 86.5%, respectively.