GEOLOGY

Detailed explanation-1: -Yellow fever, smallpox, measles, and polio are prime examples of epidemics. An epidemic disease doesn’t necessarily have to be contagious. West Nile fever and the rapid increase in obesity rates are also considered epidemics.

Detailed explanation-2: -An epidemic is a disease which spreads rapidly, affecting a large number of people within a community, population or region. An epidemic is usually clinically more severe than an endemic disease. Example: The Ebola epidemic in West Africa from 2014–2016.

Detailed explanation-3: -An endemic disease is a disease 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.

Detailed explanation-4: -However, ‘outbreak’ is usually used when diseases happen in a more limited geographic area. If an outbreak of a diseases spreads quickly to more people than experts would expect and moves into a large geographic area, it is often then called an epidemic.

Detailed explanation-5: -Common-source. Point. Continuous. Intermittent. Propagated. Mixed. Other.