Vectors are animals or insects that carry disease-causing pathogens and spread them to humans. Mosquitoes, flies and ticks are common vectors. For example, mosquitoes spread malaria and dengue by biting people.
Class 8 NCERT Science Curiosity Chapter 3 Health: The Ultimate Treasure solutions
class 8 science chapter 3 health the ultimate treasure question answer
Vectors are living organisms—usually insects like mosquitoes, houseflies or ticks—that carry pathogens and transfer them to humans. These animals don’t get sick themselves but pass on diseases. For example, mosquitoes carry the parasites that cause malaria or the virus that causes dengue. Houseflies can spread germs from garbage to food. Controlling vectors by using nets, repellents and maintaining cleanliness helps prevent such diseases from spreading.
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