A92-A99: Arthropod-borne viral fevers and viral haemorrhagic fevers

The group of conditions classified under Arthropod-borne viral fevers and viral haemorrhagic fevers include illnesses transmitted by arthropod vectors such as mosquitoes, ticks, and fleas. These diseases are most commonly caused by flaviviruses, alphaviruses, and bunyaviruses. Typical symptoms may begin with fever, headache, and joint pain, progressing eventually to severe manifestations like bleeding disorders and organ failure in the case of haemorrhagic fevers. These fevers are often characterized by sudden onset, and the severity can range from mild (as in the case of some dengue infections) to severe and life-threatening (as in the case of Ebola or Marburg virus diseases). Medical attention is necessary as a high proportion of these infections can become life-threatening. The infection targets several body systems, most notably the immune system, circulatory system, and major organs such as the liver and kidneys. These diseases can be especially severe in individuals with weakened immune systems.