Several case studies from Singapore, Thailand, and Indonesia have reported misdiagnosed COVID-19 patients with dengue fever after thrombocytopenia and tested positive for dengue Immunoglobulin M (IgM) as well as positive non-structural protein 1 (NS1) and Immunoglobulin G (IgG) in some cases [39–41]. The gene discussed is CD40LG; the disease is dengue disease.