Vector for Yellow fever is: September 2011, March 2013
**Core Concept**
The underlying principle being tested is the knowledge of **vector-borne diseases**, specifically the transmission of **Yellow Fever**. Yellow Fever is a **viral hemorrhagic disease** transmitted by the bite of an infected mosquito.
**Why the Correct Answer is Right**
The correct vector for Yellow Fever is the **Aedes mosquito**, particularly **Aedes aegypti**. This mosquito species is the primary vector responsible for the transmission of the Yellow Fever virus. The virus is transmitted when an infected mosquito feeds on a human, injecting the virus into the person's bloodstream.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified, but typically other options might include other mosquito species or vectors for different diseases.
**Option B:** Incorrect for similar reasons as Option A, lacking specificity to Yellow Fever.
**Option D:** Incorrect as it does not relate to the known vector for Yellow Fever.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **Aedes aegypti** is also the vector for other significant diseases like **Dengue Fever** and **Zika Virus**, making its control crucial in preventing outbreaks of these diseases.
**Correct Answer:** Aedes mosquito, specifically **Aedes aegypti**.