Derby shoe. A derby (pronounced /ËdÉËrbi/ DAR-bee or in North American English /ËdÉËrbi/ DUR-bee; also called gibson) is a style of boot or shoe characterized by quarters with shoelace eyelets that are sewn on top of the vamp. This construction method, also known as open lacing, contrasts with that of the oxfords.
Dengue is an infectious disease caused by dengue viruses, which are transmitted to humans by mosquitoes. The rising level of dengue infections has become a serious international concern.
Dengue Fever. Overview. Dengue fever is a disease spread by the Aedes aegypti mosquito and is caused by one of four dengue viruses. Once you are infected with one of the dengue viruses, you will develop immunity to that virus for the rest of your life. However, you can still be infected with the other three viruses.