CD40LG and COVID-19: Moreover, 44 anonymised DENV-positive sera, from cases of acute dengue (27 of whom confirmed by NS1 antigen positivity, plus 17 probable diagnosis with only IgM and IgG positivity), were tested by using COVID-19 IgG/IgM Rapid Test Cassette (Orient Gene, Zhejiang, China) and 2019-NCOV IgG/IgM Rapid Test Cassette (ScreenItalia, Perugia, Italy).