Vaccination has eliminated many infectious diseases like smallpox and polio. But modern lifestyle choices, such as unhealthy diets, inactivity and stress, have led to an increase in non-communicable diseases like diabetes and heart problems. Class 8 Science Curiosity Chapter 3 Health: ...
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The school should send sick students home, sanitize classrooms, encourage mask-wearing and ensure handwashing. Morning checks, health announcements and temporary isolation of sick children can help stop the flu from spreading further. Class 8 Science Grade 8 Chapter 3 Health: The ...
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 ...