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[18] [19] The incubation period (time between exposure and onset of symptoms) ranges from 3 to 14 days, but most often it is 4 to 7 days. [ 20 ] The characteristic symptoms of mild dengue are sudden-onset fever, headache (typically located behind the eyes), muscle and joint pains, nausea, vomiting, swollen glands and a rash.
[5] [9] The fever itself is classically biphasic in nature, breaking and then returning for one or two days, although there is wide variation in how often this pattern actually happens. [12] [13] In some people, the disease proceeds to a critical phase around the time fever resolves [7] and typically lasts one to two days. [8]
By the late 1990s, dengue was the most important mosquito-borne disease affecting humans after malaria, with around 40 million cases of dengue fever and several hundred thousand cases of dengue hemorrhagic fever each year. Significant outbreaks of dengue fever tend to occur every five or six months.
Symptoms usually last between 2–7 days, and most people feel better after one week. The fever typically persists for at least 24 hours and may spike again. Between 0.5% and 5% of cases become ...
For perspective, there have been 2,559 cases of dengue fever reported in U.S. states and territories since the start of 2024, per the CDC. A large majority of those (1,724) were reported in Puerto ...
By early December, there had already been more than five million dengue infections worldwide this year—a dramatic increase from some 500,000 cases in 2000—recorded across at least 80 countries ...
Dengue virus has increased dramatically within the last 20 years, becoming one of the worst mosquito-borne human pathogens that tropical countries have to deal with. 2013 estimates indicate that as many as 390 million infections occur each year, and many dengue infections are increasingly understood to be asymptomatic or subclinical. [9]
Similarly, about one in four people who contract dengue develop symptoms lasting two to seven days, but symptoms are usually mild and may include fever, rash, nausea, vomiting, muscle pain, joint ...