While the dengue fever data coming out of Vietnam is months behind, we can see that dengue is up in the southeast Asian country year-to-date.

Aedes aegypti Image/CDC
Aedes aegypti

Through Aug 31, Vietnam reported 63,504 cases of dengue including 20 deaths, in 44 out of 63 provinces in the country. This is an increase of 16,500 cases in August alone.

The cumulative number of cases increased by 97% with a decrease of three deaths compared to the same period in 2015. Compared to the median in 2011-2015 period, the cumulative number of dengue cases has increased by 99.7%

Related: Zika cases triple in Ho Chi Minh City

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.