CD40LG and infection: None of the 18 sera of patients with a history of infection with the human coronaviruses CoV-NL63, CoV-229E, CoV-HKU1, or CoV-OC43 (genera Alphacoronavirus and Betacoronavirus) were positive in the Vidas SARS-CoV-2 IgG assay, while the serum of one CoV-NL63-positive patient was positive in the Vidas SARS-CoV-2 IgM assay.