CD40LG and COVID-19: Overall, the diagnostic sensitivity of the four POC antibody rapid tests for early detection of COVID-19 infection, i.e., within 14 days of symptom onset, was 50.0% (95% CI, 34.9–65.1%), 41.3% (95% CI, 27.0–56.8%), 47.8% (95% CI, 32.9–63.1%), and 52.2% (95% CI, 37.0–67.1%) for AllTest 2019-nCoV IgG/IgM Rapid Test, Dynamiker 2019-nCoV IgG/IgM Rapid Test, ASK COVID-19 IgG/IgM Rapid Test, and Wondfo SARS-CoV-2 Antibody Test, respectively.