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hoi polloi in the U.S. are at a mellow risk of get dengue fever this twelvemonth , the Centers for Disease Control and Prevention ( CDC ) warns .

In anew wellness alertissued on Tuesday ( June 25 ) , CDC representatives say that people should be extra vigilant about this potentially deadly viral contagion , which is distribute to people via the bite of an infected mosquito .

Close-up of a mosquito sucking human blood from skin. The mosquito is black on the top with white specks, while its underbelly is red.

A rise in global cases of the mosquito-spread dengue fever in 2024 puts Americans at risk, the CDC warns.

U.S.-based doctor should also be on the lookout for the disease , particularly in traveller retort from places where it regularly spread out . As of June 24 this class , 745 U.S. travelers have been diagnosed with dengue — a " higher - than - anticipate " number . By comparison , an average of about 1,600 travel - related caseswere describe for the full year in 2022 and 2023 , and historically , yearly identification number were lower than that .

Common dandy fever symptomsinclude a fever with aches and pains , nausea and a rash that starts out flat and red and then later looks standardized to a morbilli blizzard . symptom commonly develop within two week of a person being bitten by an infected mosquito , and in most people , these symptoms vanish within a week .

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A close-up image of a mosquito ingesting a blood meal from a person�s hand.

However , infants younger than 1 yr old , significant people , adults over geezerhood 65 and people with certain medical condition , such as diabetes , are at an increase risk of train severe dengue , which can be fatal . This life - threatening condition can cause profligate vessel to leak out and the number of clot - forming cellular telephone in the rakehell to decrease , leading to shock , internal hemorrhage and organ failure .

There isno specific treatment for dengue pyrexia , but drug such as painkiller can help oneself carry off a patient ’s symptoms , and in grave showcase , supportive care in a hospital and blood transfusions may be call for .

The CDC ’s Modern monition comes as dengue pillowcase rise worldwide this twelvemonth .

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Dengue fever isendemicto tropic and semitropical regions of the reality . This year , various countries , such as Argentina and Brazil , have reported higher - than - common case routine . Across the Americas , more than 9.7 million dengue cases were reported between Jan. 1 and June 24 this year — twice the amount recorded in the whole of 2023 .

Dengue fever is autochthonal in six U.S. territories and freely relate states : Puerto Rico , American Samoa , the U.S. Virgin Islands , the Federated States of Micronesia , the Republic of the Marshall Islands and the Republic of Palau . Earlier this yr , Puerto Rico declared a public wellness emergency over soar casing of dengue feverishness , which now number 1,498 , according to the CDC . This has already travel by the entire figure for 2023 , which wasestimated to be 1,293 case .

Local transmission — meaning the disease has been find in hoi polloi who have not recently traveled to a realm where dengue is endemic — is usually rare in the U.S. However , little outbreaks or sporadic caseshave previously been recorded in Florida , Hawaii and Texas , and in the past two years , local transmission of dengue has been substantiate inArizonaandCaliforniarespectively .

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As global event of dengue soar , experts expect that cases in travelers returning to the U.S. from dengue - autochthonous expanse will also rise .

" We wait that most dengue compositor’s case in the U.S. this summer will occur among travelers returning from arena where irruption are happening,“Dr . Albert Ko , a professor of public health at Yale University , told Live Science in an e-mail .

" But we need to be organise for transmission in regions of the U.S. where the virus has circulated in the past , such as Puerto Rico , and parts of Florida , Texas and California , " he enunciate . " We also need to be on the lookout for dengue in regions of the U.S. where transmission has n’t been detected , but the mosquito that can carry the virus is present and has expanded because of increasing climate change . "

an infant receives a vaccine

mosquito in the genusAedescan carry dengue , and higher temperatures can blow up the range of such mosquitoes and also involve their breeding and pungent habits .

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The CDC recommends hold measure to help keep mosquito bit , such as wearing on the loose - fitting , long - sleeve pant and shirt while outdoors , usingEPA - registered glitch sprays , and controlling the cattle farm of mosquito at house using window screens to stop the insects from get under one’s skin indoors .

Anyone with a fever or dengue symptoms who has last in or traveled to a part with eruption should seek aesculapian precaution , the delegacy noted .

Close up of a medical professional holding a syringe drawing vaccine from a vial to prepare for injection.

This clause is for informational determination only and is not stand for to offer aesculapian advice .

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