Pandemic, Epidemic, Endemic

[islander]

pandemic 
/panˈdɛmɪk/

adjective
1. (of a disease) prevalent over a whole country or the world.
synonyms: universal, global

noun
1. an outbreak of a pandemic disease

When an epidemic spreads throughout the world.


epidemic
/ɛpɪˈdɛmɪk/

adjective
1. of the nature of an epidemic
synonyms: rife, rampant, widespread

noun
1. a widespread occurrence of an infectious disease in a community at a particular time
synonyms: outbreak, plague, scourge, infestation

An outbreak of disease that attacks many peoples at about the same time and may spread through one or several communities.


endemic
/ɛnˈdɛmɪk/

adjective
1. (of a disease or condition) regularly found among particular people or in a certain area
2. (of a plant or animal) native and restricted to a certain place

noun
1. an endemic plant or animal

A disease that exists permanently in a particular region or population.