CD40LG and COVID-19: Conversely, for a pretest probability of 50%, two tests showed a marked increase in effectiveness compared to the cheapest test: One Step COVID-19 Test (GuangZhouWondfo Biotech Co., Ltd.)and COVID-19 IgG/IgM ECO (Eco Diagnostica Ltda), with respective ICER values of US$ 0.25 and US$ 298.60per correctly diagnosed case.