## **Core Concept**
The World Health Organization (WHO) has set goals for the elimination of several diseases, including lymphatic filariasis. Lymphatic filariasis, also known as elephantiasis, is a major public health problem in many tropical and subtropical countries. The disease is caused by infection with filarial parasites, primarily *Wuchereria bancrofti*, *Brugia malayi*, and *Brugia timori*, which are transmitted to humans through the bite of an infected mosquito.

## **Why the Correct Answer is Right**
The WHO launched the Global Programme to Eliminate Lymphatic Filariasis in 2000, with a goal to eliminate the disease as a public health problem by 2020. The strategy for elimination includes mass drug administration (MDA) to treat entire communities at risk, in addition to vector control measures. While 2020 was the initial target, progress has been made, but challenges remain, and new targets may have been set in response to the challenges faced.

## **Why Each Wrong Option is Incorrect**
- **Option A:** 2015 is too early for a global elimination target given the widespread nature of the disease and the strategies required for its control.
- **Option B:** 2030 could potentially be a new or revised target considering the setbacks or challenges faced in achieving the initial 2020 goal, but without specific information, it's less directly linked to known global campaigns.
- **Option D:** 2040 seems further ahead and could be considered for long-term goals but is not specifically recognized in major global health initiatives as of the last update.

## **Clinical Pearl / High-Yield Fact**
A key strategy in the elimination of lymphatic filariasis includes the use of albendazole, ivermectin, and diethylcarbamazine, either alone or in combination, for mass treatment. Another critical aspect is the prevention of mosquito bites to reduce transmission. The global effort aims not only to treat infected individuals but also to interrupt transmission in endemic areas.

## **Correct Answer:** . 2020