Dengue Outbreaks

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Last reviewed
November 29, 2022

Dengue Outbreak 2022

According to the U.S. Centers for Disease Control and Prevention (CDC), dengue is a vectorborne infectious disease caused by dengue viruses, predominantly transmitted by Aedes aegypti and Aedes albopictus mosquitos, that is endemic in about 125 countries.

Dengue fever is caused by four closely related viruses (DENV-1–4), and a person can be infected with each serotype for a total of four infections during their lifetime. 

There is no specific treatment for dengue/severe dengue, but there are dengue prevention vaccines available. Dengue vaccines and candidates' information can be found on this web page.

Dengue in Florida 2022

As of November 2, 2022, the U.S. CDC reported the state of Florida had confirmed 582 travel-related and 32 locally-acquired dengue cases this year. Florida's reportable diseases frequency report is updated weekly. In addition, weekly data is posted at Florida Arbovirus Surveillance.

On October 21, 2022, the Florida Department of Health in Broward County issued a mosquito-borne illness alert. Two local cases of Dengue fever have been confirmed. During the summer of 2022, the Florida Department of Health in Miami-Dade County was under a mosquito-borne illness advisory. There were 18 locally acquired dengue cases in Miami-Dade County, including a cluster of four cases in a single Miami neighborhood. And in Collier County, Florida, one locally-acquired dengue patient has been identified near Naples, Florida.

Until 2009, there were no reports of dengue acquired in Florida since 1934. However, in 2009 -2010, an outbreak of dengue was identified in Key West. A total of 22 persons were identified with dengue fever during the summer and fall of 2009.

Dengue in the U.S.

Provisional data published by the U.S. CDC as of November 2, 2022, about 888 travel-related dengue cases have been reported by U.S. states in 2022. The CDC says dengue is endemic in Puerto Rico, American Samoa, the U.S. Virgin Islands, the Federated States of Micronesia, the Republic of Marshall Islands, and the Republic of Palau. 

Furthermore, Puerto Rico has reported about 309 locally-acquired dengue cases in 2022. From 2010–to 2020, approximately 95% of locally acquired dengue cases in the United States (n = 31,289) occurred in Puerto Rico (n = 29,779). In addition, Puerto Rico's Department of Health Arboviral Disease Report indicates that 574 confirmed, 261 related hospitalizations, 73 severe cases, and two dengue deaths were reported in 2021.

November 14, 2022 - Maricopa County Department of Public Health (Arizona) identified one person with dengue to who a locally infected mosquito might have exposed.

Dengue Endemic Countries

The ECDC reported in August 2022 that over 2,5 million cases and 2,065 deaths have been reported, led by Brazil (1,910,657), Vietnam (145,536), Philippines (82,597), Indonesia (68,903), and Peru (57,469). On November 16, 2022, GAVI reported Dengue fever is endemic in Pakistan, but historic flooding has triggered a sudden rise in cases during 2022. And as of November 20, 2022, a total of 52,807 laboratory-confirmed dengue cases and 230 related deaths have been reported in Bangladesh since January 2022.

The most dengue fatalities have been reported in Brazil (774) during 2022.

In 2021, a total of 1,64,103 dengue cases were reported in India.

Dengue Presentation U.S. CDC

The U.S. CDC's Advisory Committee on Immunization Practices (ACIP) met on October 20, 2022, and Wilbur Chen, MD, MSc ACIP Workgroup Chair reviewed the following presentations: Dengue Epidemiology: Globally and in the U.S., Laura Adams DVM, MPH, DACVPM; and UPDATE ON DENGVAXIA: EFFICACY, SAFETY, AND IMPLEMENTATION, presented by GABRIELA PAZ-BAILEY DENGUE BRANCH CHIEF, DVBD, CDC.