Dengue Fever
Dengue Fever is a viral illness spread by infected mosquitoes. Dengue can make you very sick, and can be life threatening. There are four types of the virus that cause dengue fever – type 1, 2, 3, and 4. People can become immune to one type once they have been infected with it, but can still get sick from the other types of dengue if exposed because cross-protection immunity among the four dengue virus types is limited.
Catching different types of dengue, even years apart, increase the risk of developing severe dengue.