|Mosquitoes are excellent transmitters of disease carrying viruses to humans and animals. Which of the following factors aid this process?|
|1. Mosquitoes themselves are immune to these viruses.|
|2. Most of the world's population lives in environments amenable to mosquito growth and survival.|
|3. No vaccine has been successfully developed against mosquito borne diseases.|
|Select the correct answer using the codes given below.|
A) 2 and 3
B) Only 3
C) Only 1
D) All of these
Correct Answer: D
Solution :[d] It is true that mosquitoes themselves are immune to the viruses they transmit. This ensures that the mosquitoes, themselves survive and the virus is transmitted successfully to the target. Mosquitoes prefer warm and humid climate which ensures their survival and growth. Such type of climate is found in the most populated regions of the world in Asia, Latin America, and Africa etc. While vaccination against mosquito borne diseases such as Malaria and Dengue have not been successful, those against other mosquito borne diseases have been developed successfully.
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