Dengue fever is a serious viral infection caused by the dengue virus, which is transmitted to humans through the bite of an infected mosquito. The disease is prevalent in tropical and subtropical regions of the world and is responsible for millions of cases worldwide each year. In this article, we will explore the symptoms of dengue fever, methods of prevention, and the role of vaccines in protecting individuals from this disease.


The clinical presentation of dengue fever is often biphasic, with a brief asymptomatic period following the initial infection. The first phase of the illness is characterized by high fever, headache, fatigue, muscle pain, and joint pain. A rash may also develop, often described as a “patchy” or maculopapular rash. In most cases, these symptoms resolve within a week. However, in some individuals, the disease may progress to the second phase, which is characterized by more severe symptoms such as persistent fever, vomiting, diarrhea, and abdominal pain. In severe cases, dengue can lead to dengue shock syndrome (DSS), a life-threatening condition requiring immediate medical attention.

Here are some specific symptoms of dengue fever:

  1. High fever: Dengue fever usually starts with a sudden high fever that may reach 40°C (104°F) or higher. The fever may last for several days and usually peaks on the second or third day of illness.
  2. Headache: Dengue fever often causes severe headaches, which may be felt throughout the body. The headache may be accompanied by neck pain and stiffness.
  3. Fatigue: Dengue victims often feel extremely tired and weak, with little energy or motivation to perform daily activities.
  4. Muscle pain: Dengue victims may experience muscle pain throughout their bodies, especially in their backs, legs, and arms. The pain may be severe enough to interfere with normal movement.
  5. Joint pain: Dengue victims may also experience joint pain, particularly in their knees, ankles, and wrists.
  6. Rash: Dengue victims often develop a rash that is often described as a “patchy” or maculopapular rash. The rash may cover the entire body, including the face, and may be accompanied by itching.
  7. Gastrointestinal symptoms: Some dengue victims experience gastrointestinal symptoms such as nausea, vomiting, abdominal pain, and diarrhea.
  8. Bleeding: In severe cases of dengue, victims may experience bleeding from the nose, gums, or even internal organs.
  9. Dengue shock syndrome (DSS): In the most severe cases, dengue can lead to dengue shock syndrome (DSS), a life-threatening condition requiring immediate medical attention. DSS is characterized by severe hypotension, rapid heart rate, and other cardiovascular system abnormalities that can lead to shock and death if not promptly treated.


Prevention of dengue fever is mainly achieved by reducing exposure to infected mosquitoes. This can be achieved by using mosquito repellents, wearing long-sleeved clothing and using mosquito nets at night. Eliminating standing bodies of water that may harbor mosquitoes is also key to preventing disease transmission. It is important to note that there is no evidence that the use of anti-mosquito window screens or air conditioners can prevent the spread of dengue fever.

Here are some specific prevention methods:

  1. Use of mosquito repellent: Insect repellent is an effective tool to prevent mosquito bites. Using repellent on exposed skin can reduce the chances of mosquito bites. Choose a repellent that contains DEET (mosquito avoidance amine) or other active ingredients.
  2. Wear long-sleeved clothing: Wearing long-sleeved clothing reduces the chance of mosquitoes coming into contact with your skin, thus reducing the risk of infection. Long-sleeved clothes, long pants and long skirts are good choices.
  3. Use a mosquito net: At night, using a mosquito net can provide a protective barrier to prevent mosquitoes from entering the sleeping area. Make sure mosquito nets are in good condition and close them before going to bed.
  4. Remove standing water: Removing standing bodies of water that can harbor mosquitoes is key to preventing the spread of dengue fever. This includes removing standing water from rain puddles, drains, buckets and other containers.
  5. Avoid aquatic environments: Try to avoid swimming, bathing or touching water in bodies of water where there may be a risk of dengue transmission. Especially during periods of high outbreak, avoid visiting infected areas or crowded waters.
  6. Vaccination: There is no vaccine against dengue fever, but vaccination can prevent other mosquito-borne diseases such as yellow fever and encephalitis.