The number of dengue fever and dengue hemorrhagic fever (DHF) cases in Thailand since the beginning of the year through the end of September totals 46,344 people from representing all 77 provinces, according to the Thai Bureau of Epidemiology.

Aedes aegypti/CDC
Aedes aegypti/CDC

Included in this total are 36 dengue related deaths.

The provinces with the highest prevalence include Maehongsorn,  Chiengmai,  Surin, Bungkan and Mukdahan.

In addition, Thailand is now one of 11 countries to approve the Sanofi Pasteur dengue vaccine, Dengvaxia. Dengvaxia is the first vaccine licensed for the prevention of dengue in the world.

Dengue infects nearly 400 million people across more than 120 countries each year. Most survive with few or no symptoms, but more than two million annually develop what can be a dangerous dengue hemorrhagic fever, which kills more than 25,000 people each year.

Dengue can cause a high fever, severe headaches, severe pain behind the eyes, rash and joint, muscle or bone pain. Dengue hemorrhagic fever occurs when blood leaks from blood vessels into other parts of the body, which can lead to failure of the circulatory system, shock and possibly death, without prompt treatment.