Key facts
Nearly 1.4 billion people in 73 countries worldwide are threatened by lymphatic filariasis, commonly known as elephantiasis.
Over 120 million people are currently infected, with about 40 million disfigured and incapacitated by the disease.
Lymphatic filariasis can result in an altered lymphatic system and the abnormal enlargement of body parts, causing pain and severe disability.
Acute episodes of local inflammation involving the skin, lymph nodes and lymphatic vessels often accompany chronic lymphoedema.
To interrupt transmission WHO recommends an annual mass drug administration of single doses of two medicines to all eligible people in endemic areas.