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Dengue

Dengue fever is an infection transmitted through bites by infected mosquitos. There are four types of dengue viruses, and individuals who have had dengue fever before can be infected again.

Dengue fever typically causes fever, rashes, headache, body aches and symptoms of bleeding (such as bruising, gum bleeding and nose bleeding). In severe cases, patients may have persistent vomiting, fluid accumulation in their lungs or abdomen, more severe bleeding and even organ failure.

During a second episode of dengue fever, there is a higher risk of developing severe symptoms. The dengue vaccine is recommended after the first episode of dengue fever to reduce the risk of a second episode causing severe dengue.

Who should get the Dengue Vaccine?

  • People with a previous documented dengue infection
  • People who have a blood test showing previous dengue infection
  • The dengue vaccine is not recommended for individuals who have never had dengue fever before, as they are at risk of getting severe dengue should they become infected with the dengue virus after receiving the vaccine

How is the vaccine given?

  • The dengue vaccine is given as an injection into the arm
  • 3 doses are required, at 6-month intervals
  • The first dose should be administered at least 6 months after dengue fever

What are the common side effects of the vaccine?

  • Pain or swelling over the injection site
  • Fever
  • Stomach discomfort, vomiting or diarrhea
  • Severe allergic reactions: rashes, eye swelling, lip swelling or difficulty breathing
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