Thailand Records 21,620 Dengue Cases And 31 Deaths In 2026

Thailand has recorded more than 21,000 dengue infections so far this year, with health authorities reporting 21,620 cases and 31 deaths as the country moves through its seasonal dengue period.

The figures, released by Thailand’s Department of Disease Control (DDC), cover the period from 1 January to 19 August 2026. Officials said the number of infections remains below both last year’s total and the forecast for 2026, but warned that cases are continuing to rise during the dengue season.

Bangkok alone has recorded 1,785 cases and four deaths, according to figures from the Bangkok Metropolitan Administration’s Health Department. Health officials are urging residents to remain vigilant as mosquito activity continues.

Health Officials Step Up Dengue Prevention

Dr Anek Mungaomklang, deputy director-general of the DDC under Thailand’s Ministry of Public Health, said areas recording multiple dengue infections require continued surveillance and disease-control measures.

These measures include monitoring patients, investigating reported infections, identifying possible additional cases and controlling both mosquito larvae and adult mosquitoes.

Officials are also calling on members of the public to remove potential breeding sites around their homes. Dengue is primarily transmitted by Aedes mosquitoes, which can breed in surprisingly small amounts of stagnant water.

The DDC has been working with local health authorities in Bangkok to investigate and control dengue outbreaks in affected communities.

Stagnant Water Creates Mosquito Breeding Grounds

Dr Pongtorn Chartpituck, director of the Institute for Urban Disease Control and Prevention under the DDC, said recent operations in Bangkok’s Bang Kapi district identified accumulated rubbish and stagnant water as significant environmental risks.

Teams worked with residents to remove rubbish and standing water from areas around homes. Authorities also established active screening points and checked schoolchildren for possible symptoms.

Community meetings have been organised to raise awareness about dengue prevention, while health authorities have supplied mosquito repellent, fogging chemicals and mosquito coils to assist local efforts.

Officials said Aedes mosquitoes can lay eggs in a wide range of containers capable of holding stagnant water. These include household water containers, discarded objects, jar lids, plant-pot saucers, ant traps and other items around homes.

Residents Urged To Watch For Dengue Symptoms

The DDC is encouraging residents to follow a three-step approach to reduce mosquito populations: remove rubbish and containers that can collect water, keep homes clean to minimise areas where mosquitoes can rest, and ensure water containers are properly covered.

People are also advised to reduce the risk of mosquito bites by using insect repellent and sleeping under mosquito nets. Such measures can also help protect against other mosquito-borne illnesses, including chikungunya and Zika virus.

Health officials are urging people to seek medical attention if they develop a high fever, particularly a temperature above 38.5 degrees Celsius lasting for more than two days.

Other warning signs can include headaches, pain behind the eyes, facial redness, increased thirst and small bleeding spots appearing beneath the skin on areas such as the arms, legs or torso.

Pongtorn advised people experiencing these symptoms to seek hospital treatment promptly rather than attempting to manage the illness themselves with medication.

With dengue cases continuing to climb during Thailand’s seasonal outbreak period, authorities are urging communities to take preventive measures seriously. Removing stagnant water and reducing mosquito breeding sites remain among the key steps residents can take to limit the spread of the disease.