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.
Viruses are tiny agents that can infect a variety of living organisms, including bacteria, plants, and animals. Like other viruses, the dengue virus is a microscopic structure that can only replicate inside a host organism.he four closely related dengue viruses â DEN-1, DEN-2, DEN-3, and DEN-4 â are found in the same regions of the world. The dengue virus is a roughly spherical structure composed of the viral genome and capsid proteins surrounded by an envelope and a shell of proteins.