Yellow fever is an acute viral disease transmitted to humans through the bite of an infected mosquito, specifically the Aedes aegypti. This disease is prevalent primarily in tropical Africa and South America. It is named "yellow" because of the jaundice that causes yellowing of the skin and whites of the eyes in some patients. Yellow fever is a serious and potentially fatal disease, but it can be prevented with an effective vaccine.<br /><br />Causes of Yellow Fever<br />Yellow fever is caused by a virus from the Flavivirus family and is transmitted to humans through:<br />The bite of an infected mosquito, which acquires the infection by feeding on the blood of an infected animal or human.<br />Urban transmission cycle: The infection is spread to humans by mosquitoes in crowded cities.<br />Wild or forest cycle: It is spread among monkeys and mosquitoes in forests, and humans may become infected upon entering a forest environment.<br /><br />Yellow Fever Symptoms<br />Symptoms usually appear 3 to 6 days after exposure and are divided into two stages:<br />The first stage (mild):<br />Sudden fever.<br />Headache.<br />Muscle aches, especially in the back.<br />Chills.<br />Loss of appetite.<br />Nausea and vomiting.<br />The second stage (severe - in some cases):<br />Jaundice (yellowing of the skin and eyes).<br />Bleeding from the mouth, nose, or eyes.<br />Vomiting blood.<br />Liver and kidney failure.<br />Shock, which can lead to death in severe cases.<br />About 15% of patients enter the severe stage, with an estimated mortality rate of up to 50%.<br /><br />Diagnosis of Yellow Fever<br />Diagnosis is based on:<br />Clinical examination and travel history or exposure to mosquito bites.<br />Blood tests: to detect the virus or antibodies to it.<br />In some cases, a virus culture or PCR test is performed to confirm infection.<br /><br />Yellow Fever Treatment<br />There is no specific treatment for the virus, but treatment focuses on:<br />Strict rest.<br />Fluid and salt replacement.<br />Treatment of symptoms such as fever and pain.<br />Hospital care for severe cases, especially if bleeding or organ failure occurs.<br /><br />Yellow Fever Prevention<br />Vaccination: The yellow fever vaccine is more than 95% effective, and a single dose provides lifelong protection.<br />Mosquito control: Spray with insecticides, drain standing water, and use bednets.<br />Personal precautions:<br />Use mosquito repellent.<br />Wear long clothing.<br />Avoid travel to endemic areas without vaccination.<br /><br /><br />Al-Mustaqbal University is the first university in Iraq.