THIRUVANANTHAPURAM: The health department has asked the people to be extra vigilant against dengue fever as the rains continue in the state. Today is the National Dengue Day. Destruction of mosquitoes' breeding sites is most important in prevention. If you notice any symptoms, avoid self-medication and seek medical attention immediately.

Dengue is transmitted by freshwater Aedes mosquitoes. Aedes mosquitoes bite during the day. Symptoms appear 3 to 14 days after the virus enters the body.

Symptoms of the disease

Sudden onset of high fever

Severe headache

Pain in the muscles and joints behind the eyes

Red patches on chest and face

Nausea and vomiting

Black stool

Sudden shortness of breath

Prevention

Do not allow even a drop of water to stagnate.

Cover water sources completely

Use mosquito repellents

Wear clothes that cover the body

Close windows and doors

Use mosquito nets while sleeping during the day

Source reduction of mosquitoes once a week