The search terms will be used in Google Scholar, "HLA Dengue Fever", "HLA Dengue Hemorrhagic Fever". "HLA-A*24 Dengue Hemorrhagic fever", "HLA-A*24 Dengue fever", "HLA-B*44 Dengue Hemorrhagic fever", "HLA-B*44 Dengue fever". Limitations on study publication date from 2000-2022 will be applied.