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Epidemics vs. Pandemics, How does disease spread, Some diseases can be…
Epidemics vs. Pandemics
What causes and epidemic
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Infected food or water
One way an epidemic can begin is if the food or water gets infected with a disease. If the local water supply of a city gets infected, then a number of people of the city will become sick, starting an epidemic.
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How do they end
Fewer hosts
When an epidemic first starts out it can attack the weakest and most susceptible people. These people may die or survive. If these people survive they may build up immunities to the disease. Over time, the disease finds fewer and fewer hosts it can easily attack. Eventually the epidemic slows down and comes to an end
seasonal
Some diseases are seasonal. The flu, for example, is spread more easily during the winter and tends to die out come spring time.
fewer carriers
Sometimes the carriers of the disease may become inactive. An example of this is malaria that is transmitted by mosquitoes. Mosquitoes become inactive during the cold weather or winter.
How does Disease spread
Airborne transmission
Infection can also travel through the air, usually when a person coughs or sneezes. Examples of airborne diseases include influenza, measles, and tuberculosis.
Foods and water
Some diseases can be spread through infected food or water. Examples include cholera, dysentery, and typhoid fever.
Insects
Insects can carry diseases and transmit them from person to person. Examples of insect-borne diseases include the bubonic plague and malaria.
What is a pandemic
A pandemic is an epidemic that has spread across a large region, typically across multiple continents or worldwide. Examples of pandemic diseases include typhus, influenza, the Bubonic Plague (Black Death), malaria, smallpox, and Coronavirus.
Six stages of a pandemic
The virus is found in animals, but not in humans.
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Some diseases can be spread through infected food or water. Examples include cholera, dysentery, and typhoid fever.
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