Define: endemic, epidemic, pandemic. Give examples also.
Answers
Answer:
An endemic disease is the one that is always present in a population, e.g. chickenpox, malaria, etc. Endemic diseases are relatively rare and not as widespread as an epidemic. It is always prevalent in the population that lives in that area. These areas contain viruses, bacteria or parasites which can transmit the diseases to humans.
Example Malaria
Epidemics of infectious disease are generally caused by several factors including a change in the ecology of the host population.
Example increased stress or increase in the density of a vector species.
A pandemic is defined as “an epidemic occurring worldwide, or over a very wide area, crossing international boundaries and usually affecting a large number of people”.
Example The 1918 Spanish flu pandemic: The 1918 Spanish influenza outbreak is still said to be one of the worst pandemics in recent history. Roughly one-third of the world’s population was infected with this flu virus.
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