**Question:** Vector of Crimean Congo Hemorrhagic Fever:-

A. Aedes mosquito
B. Hyalomma tick
C. Culicoides midges
D. Phlebotomus sandfly

**Core Concept:** Crimean Congo Hemorrhagic Fever (CCHF) is a viral hemorrhagic fever caused by the CCHF virus, which is transmitted to humans through the bite of infected ticks. The virus belongs to the Nairoviridae family and is carried by specific ticks of the genus Hyalomma.

**Why the Correct Answer is Right:** The correct answer, Hyalomma tick, is chosen due to its role as the primary vector for transmitting the Crimean Congo Hemorrhagic Fever virus to humans. Hyalomma ticks are known to harbor and transmit the virus, causing the disease.

**Why Each Wrong Option is Incorrect:**

A. Aedes mosquito: Incorrect because Aedes mosquitoes are vectors for diseases like dengue and yellow fever, not Crimean Congo Hemorrhagic Fever.

B. Hyalomma tick: Incorrect because the correct answer is Hyalomma tick (option C). The tick's role in transmitting the virus is crucial for the correct answer.

C. Culicoides midges: Incorrect as Culicoides midges are associated with diseases like Onchocerciasis (river blindness) and West Nile Virus, not Crimean Congo Hemorrhagic Fever.

D. Phlebotomus sandfly: Incorrect as Phlebotomus sandflies are vectors for diseases like Leishmaniasis, not Crimean Congo Hemorrhagic Fever.

**Clinical Pearl:** Understanding the vector of Crimean Congo Hemorrhagic Fever is essential for healthcare professionals, as it helps in disease surveillance, diagnosis, and prevention strategies. Public health measures, like controlling tick habitats and educating people about vector-borne disease prevention, can significantly reduce the risk of CCHF transmission.