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Most people recover within a week or so. In about 5% of cases, symptoms worsen and can become life-threatening. This is called severe dengue (formerly called dengue hemorrhagic fever or dengue shock syndrome). [21] [23] Severe dengue can lead to shock, internal bleeding, organ failure and even death. [24]
[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]
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 ...
There have been almost 9.7 million cases in these countries, meaning there have been twice as many cases of the virus in the first six months of 2024 than in all of 2023, which saw 4.6 million cases.
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 ...
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]
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.
There have been more than twice as many cases of dengue fever across North, South and Central America — more than 9.7 million — in the first half of 2024 than there were in all of 2023, the ...