Currently, there is no immunization that will prevent a person from contracting dengue fever if exposed to the virus. Limiting exposure to the virus depends upon protecting against mosquito bites. When traveling in tropical climates, wear insect repellent that contains DEET and long sleeved-shirts and long pants. Stay indoors during dawn and dusk when mosquitoes are most active.
2. Can dengue fever be passed from person to person?
No, the virus is not spread by person-to-person contact or by exposure to respiratory secretions. The virus is spread when a mosquito bites an infected person, then bites a healthy person. It may be transmitted in rare cases through a blood transfusion, organ donation, or mother to fetus.
3. If I have had dengue fever, can I get it again?
Yes. There are four serotypes of the dengue virus. There is no cross-protective immunity to all dengue viruses when you are exposed to one serotype. In addition, a subsequent infection with a dengue fever virus is usually associated with more severe disease.
This article was last reviewed on July 24, 2013. | This article was last modified on May 13, 2015.
The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.
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