SSC
WORLD HISTORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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More people living together (greater population density) enabled diseases to spread
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Writing led to a more sedentary lifestyle (not moving around), so people became unhealthy
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Irrigation involves slow-moving and standing water, where disease-causing organisms multiple
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People got diseases from domesticated animals such as pigs and chickens
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Detailed explanation-1: -Disease outbreaks are usually caused by an infection, transmitted through person-to-person contact, animal-to-person contact, or from the environment or other media. Outbreaks may also occur following exposure to chemicals or to radioactive materials.
Detailed explanation-2: -Bacteria. Viruses. Fungi. Parasites. Direct contact : An easy way to catch most infectious diseases is by coming in contact with a person or animal who has the infection. Indirect contact :Disease-causing organisms also can be passed by indirect contact. More items
Detailed explanation-3: -Changes in global population demographics and distribution. Human behavior and societal change. Environmental change and land use. Chronic manifestations of infectious diseases. Enhanced pathogen detection. Microbial evolution. Breakdown of the public health system and bioterrorism.