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 ...
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NCERT Solutions and important questions for Class 8 science for CBSE 2020-2021.
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Pathogens spread through air (cough or sneeze), water (contaminated drinking), food, insect bites, direct contact or touching infected objects. Sharing personal items or living in unclean surroundings also increases the risk of infection. Class 8 NCERT Science Curiosity Chapter 3 Health: ...
Communicable diseases spread through harmful microbes called pathogens—bacteria, viruses, fungi or protozoa. These pathogens enter our body through air, water, food or contact and cause illnesses like cold, flu, typhoid or measles. Class 8 NCERT Science Curiosity Chapter 3 Health: The ...
Yes, COVID-19 is a communicable disease caused by the coronavirus. It spreads through cough, sneeze or contact. It caused a global pandemic and people were advised to wear masks and maintain distance. Class 8 Science Grade 8 Chapter 3 Health: The ...
Communicable diseases spread from one person to another through air, water, food or contact. They are caused by pathogens like bacteria or viruses. Examples include flu, chickenpox, dengue and typhoid. Class 8 Science Grade 8 Chapter 3 Health: The Ultimate Treasure ...