Dengue worldwide overview

Geographical distribution of dengue cases reported worldwide – June to August 2019

Dengue cases worldwide 15 August 2019

America

In 2019 and as of 3 August, the Pan American Health Organization (PAHO) reported 2 031 000 suspected and confirmed dengue cases in the Americas region. Detailed information by country and territory can be found on the PAHO Health Information Platform

Brazil, Colombia, Honduras and Nicaragua have the highest incidence rates in the region.

The four dengue virus serotypes (DENV 1, DENV 2, DENV 3, and DENV 4) are currently circulating simultaneously which increases the risk of severe cases. In 2019, Guatemala, Honduras, and Nicaragua have declared epidemiological alerts at national level. 

Asia

Most of the reporting countries are observing a spike of cases this year.

In South Asia, the Maldives have officially reported 3 310 cases as of 6 August 2019.

As of 4 August, Thailand has reported 43 200 cases, compared with 28 100 for the same period in 2018. The most affected provinces are Ubon Ratchathani, Trat, and Chanthaburi. Due to the intense circulation of the virus throughout the country, Thailand has declared a state of emergency.

As of 20 July 2019, Cambodia has reported approximately 39 000 cases of dengue, compared with 3000 for the same period in 2018.

As of 20 July 2019, Laos has reported a cumulative number of 15 657 cases. The trend of weekly reported cases is increasing, and dengue activity is significantly higher compared with the same period in 2018 (2 500 cases).

As of 12 August 2019, Malaysia has reported 82 800 cases of dengue in 2019, compared with 46 500 cases for the same period in 2018.

The Philippines reported 146 062 dengue cases and 622 deaths since January and up to 20 July 2019. Last year, for the same period, the country had recorded 69 000 cases. The Department of Health has declared a national dengue epidemic.

As of 8 August 2019, Singapore has reported 9 600 cases of dengue, compared with 1600 cases for the same period in 2018.

As of 11 August, Taiwan has reported 375 cases, compared with 195 cases for the same period last year. The outbreak is mainly affecting the city of Kaohsiung. The majority of the cases (82%) are imported cases.

As of 20 July, Vietnam has reported 115 186 cases of dengue, compared with 29 000 cases for the same period in 2018. The number of cases has been sharply increasing since week 15 and is above seasonal levels.

Sri Lanka is following the same trend as in 2018. As of 13 August 2019, 36 858 cases of dengue have been reported, compared with 35 000 cases for the same period last year. Colombo, Gampaha and Galle districts are the most affected areas.

For Bangladesh, Pakistan and Nepal, no specific yearly trend can be observed, due to the absence of solid data for 2018. Bangladesh has almost doubled its cumulative number of cases during the past month. The country has detected 8 565 cases since the beginning of the year and as of 24 July 2019. According to the national institute of health, Pakistan has reported 2 827 cases of dengue since the beginning of the year and as of 28 July 2019. There is no update for India or Nepal.

Africa

From 10 May to 28 July 2019, Benin has reported 8 confirmed and 11 suspected cases of dengue fever.

Côte d'Ivoire has reported 300 confirmed and 2514 suspected cases as of 30 July 2019. Serotypes 1 and 3 are co-circulating.

From August 2018 to 4 August 2019, Tanzania has detected 6 829 confirmed cases. The most affected regions are Dar es Salaam and Tanga.

Regional authorities in Réunion continue to record a declining trend. Since the beginning of 2019, and as of as of 28 July 2019, the island has reported 17 990 confirmed, 48 800 suspected cases and seven deaths. The most affected areas are Saint-Pierre and Saint Paul. Despite the austral winter, the virus is still circulating, which is of concern.

Mauritius has reported 130 autochthonous cases from 26 February - 20 July 2019. The most affected area is Port Louis. The main circulating serotype is DENV-1. Regional authorities in Mayotte are reporting 80 locally acquired dengue cases, as of 6 August 2019. This represents an increase of 40 cases in the past month.

Australia and the Pacific

As of 30 July, Australia has reported 810 cases of dengue in 2019, which is higher compared with the same period in 2018 (415 cases) but still within seasonal trend.

As of 26 July 2019, New Caledonia has reported 3 852 dengue cases, compared with 1700 cases for the same period in 2018. The circulating serotype is DENV-2.

As of 28 July 2019, French Polynesia has reported approximately 630 cases of dengue since the beginning of the year, affecting the islands of Tahiti, Bora-Bora, Moorea, Nuku-Hiva and Fakarava. Both DENV-1 and DENV-2 are circulating.

All country numbers are retrieved from official sources.