What is dengue fever and how serious is it?

Dengue is a viral infection transmitted by Aedes mosquitoes. Most people experience flu-like symptoms lasting 2-7 days. However, about 1 in 20 people develop severe dengue (previously called dengue hemorrhagic fever), which can cause internal bleeding, organ failure, and death if not treated promptly.

How does dengue spread?

Dengue spreads through bites from infected Aedes aegypti and Aedes albopictus mosquitoes. These mosquitoes bite primarily during the day, particularly in early morning and before dusk. Unlike malaria, dengue cannot spread directly from person to person - it requires mosquitoes as vectors.

What are the warning signs of severe dengue?

Warning signs typically appear 3-7 days after symptoms start and include severe abdominal pain, persistent vomiting, bleeding gums or nose, blood in vomit or stool, fatigue, restlessness, and rapid breathing. Severe dengue is a medical emergency requiring immediate hospitalization.

Can you get dengue more than once?

Yes, there are four dengue virus serotypes (DENV-1, DENV-2, DENV-3, DENV-4). Infection with one provides lifelong immunity to that serotype but only temporary partial immunity to the others. Subsequent infections with different serotypes increase the risk of developing severe dengue.

Is there a dengue vaccine?

Yes, dengue vaccines exist but have specific recommendations. Dengvaxia is approved for people aged 9-45 who live in endemic areas and have had a previous dengue infection. TAK-003 is approved in some countries. The vaccines are not recommended for people who have never had dengue due to increased risk of severe disease.

Where is dengue occurring now?

Dengue is endemic in over 100 countries in tropical and subtropical regions, including Southeast Asia, Latin America, Africa, and Pacific Islands. Climate change is expanding its range. Check the live outbreak data above for current dengue activity worldwide.

South Dakota

Dengue Fever in South Dakota

Dengue is a mosquito-borne viral infection that causes flu-like illness and can develop into severe dengue, a potentially lethal complication. It is endemic in more than 100 countries, primarily in tropical and subtropical regions. Track Dengue Fever activity and outbreaks specific to South Dakota.

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¿Qué es Dengue Fever?

Dengue fever is one of the fastest-growing mosquito-borne diseases globally. Approximately half of the world's population is now at risk, with an estimated 390 million infections occurring each year. Climate change is expanding the range of Aedes mosquitoes that transmit the disease, bringing dengue to new regions.

Síntomas

High fever (104°F/40°C)
Severe headache
Pain behind the eyes
Severe joint and muscle pain (breakbone fever)
Rash (appears 2-5 days after fever)
Nausea and vomiting
Mild bleeding (nose, gums)

Transmisión

Dengue is transmitted through bites from infected Aedes aegypti and Aedes albopictus mosquitoes. These mosquitoes become infected when they bite a person with dengue virus in their blood. The virus cannot spread directly between people.

Período de Contagio: Not contagious person-to-person; infectious to mosquitoes from 1 day before fever onset through 5-7 days of illness

Prevención

Use mosquito repellent containing DEET, picaridin, or IR3535
Wear long-sleeved shirts and long pants
Use air conditioning or window/door screens
Remove standing water where mosquitoes breed
Use mosquito nets, especially during the day
Consider dengue vaccine if you live in endemic areas (consult healthcare provider)
Treat clothing and gear with permethrin

South Dakota Recursos de Salud

Información del departamento de salud local y orientación de prevención específica del estado

Estamos Monitoreando South Dakota

Nuestra vigilancia impulsada por IA monitorea continuamente la actividad de Dengue Fever en todo South Dakota. Rastreamos datos de departamentos de salud estatales, hospitales locales, informes del CDC y más de 50 fuentes de salud globales para proporcionar advertencia temprana de amenazas emergentes.

Reciba notificaciones instantáneas cuando la actividad de Dengue Fever aumenta en South Dakota o en su condado específico.

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South Dakota Departamento de Salud

Para alertas oficiales de salud del estado, ubicaciones de vacunación y orientación de salud pública específica de South Dakota, visite el sitio web del departamento de salud de su estado.

→ South Dakota Departamento de Salud → Encontrar Dengue Fever Vacunación Cerca de Usted → Avisos de Salud para Viajeros del CDC

Protegiéndose en South Dakota

Ya sea que viva en South Dakota, viaje allí o tenga familia en el estado, comprender la Dengue Fever prevención es esencial. Siga estas medidas de prevención basadas en evidencia:

Medidas de Prevención

Use mosquito repellent containing DEET, picaridin, or IR3535
Wear long-sleeved shirts and long pants
Use air conditioning or window/door screens
Remove standing water where mosquitoes breed
Use mosquito nets, especially during the day
Consider dengue vaccine if you live in endemic areas (consult healthcare provider)
Treat clothing and gear with permethrin

Cuándo Buscar Atención Médica

Si experimenta síntomas de Dengue Fever en South Dakota, contacte a su proveedor de atención médica de inmediato. El diagnóstico y tratamiento tempranos mejoran significativamente los resultados.

Síntomas de emergencia: Si experimenta síntomas graves, dificultad para respirar o signos de deshidratación, llame al 911 o vaya a la sala de emergencias más cercana.

Recursos Expertos y Referencias

Información confiable de las principales organizaciones de salud

CDC

Orientación oficial de los Centros para el Control y la Prevención de Enfermedades de EE. UU.

Ver Recursos del CDC →

WHO

Vigilancia global de enfermedades y directrices de la Organización Mundial de la Salud

Ver Recursos de la OMS →

Investigación

Últimas investigaciones revisadas por pares y estudios clínicos

Ver Investigación →

Contenido Revisado Médicamente

La información sobre enfermedades en Virus Watcher es revisada por nuestro Epidemiólogo Jefe, ex analista principal del CDC para el pronóstico FluSight. Los datos de brotes se agregan de fuentes verificadas incluyendo BEACON, ProMED, OMS, CDC y más de 50 agencias nacionales de salud. Esta información es con fines educativos y no debe reemplazar el asesoramiento médico profesional.

Última revisión: 2026-06-29

Recent Dengue Fever Reports

No confirmed cases reported in South Dakota yet. Here are the latest Dengue Fever reports from our global surveillance network.

In 2025, Colombia reported 123 745 dengue cases and 118 confirmed deaths, corresponding to a national case fatality rate of 0.09% and an incidence of 370.7 cases per 100 000 inhabitants, substantially lower than in 2024 but still above historical baseline levels. Most cases were …

Colombia · 2026-06-27

Autochthonous transmission of dengue (type 2) has been reported in Taiwan, with 4 cases in Kaohsiung City. Increased mosquito activity related to rain, especially following typhoons, is thought to be increasing risk of transmission. *Source: BEACON* - [View Full Report](https://…

Taiwan · 2026-05-24

This event envelope contains reports on Dengue in Vanuatu. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=8579d91f-76c1-46e4-9d0f-0908880602b7)

Vanuatu · 2026-06-26

This event envelope contains reports on Dengue in Viet Nam. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=3a91e29c-d693-4670-97d3-73e10352519e)

United States · 2026-06-08

Through epidemiological week 21 (data as of 01 Jun 2026), Mexico has recorded 2286 confirmed dengue cases, 23 718 probable cases, and 4 confirmed deaths nationally—a markedly quiet year, with confirmed cases down roughly 38% and deaths down about 78% compared with the same period…

Mexico · 2026-06-07

This event envelope contains reports on dengue in Brazil. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=4a4130b0-6a6c-4f10-9859-e2297a985d27)

Brazil · 2026-06-08

This event envelope contains reports on dengue in Yemen. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=2da917f7-8c72-4975-8823-087f57e306af)

Yemen · 2026-06-15

Georgia has reported up to eight imported dengue cases annually, with no evidence of autochthonous (locally acquired) transmission. *Source: BEACON* - [View Full Report](https://beaconbio.org/en/event/?eventid=ddb4120b-71b0-4d6f-8188-0d31839b3cf9)

Georgia · 2026-06-04

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Preguntas Frecuentes

Preguntas frecuentes sobre Dengue Fever respondidas por nuestro equipo de epidemiología

Enfermedades Relacionadas

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Obtenga Dengue Fever Alertas para South Dakota

Reciba notificaciones instantáneas cuando la actividad de Dengue Fever aumenta en South Dakota o sus destinos de viaje. Rastree más de 200 enfermedades con alertas basadas en ubicación. Utilizado por sistemas de salud, servicios de emergencias médicas, escuelas y viajeros de todo el mundo.

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