The World Health Organisation has declared the novel coronavirus outbreak a pandemic. A pandemic is the worldwide spread of a disease. Throughout history, many disease outbreaks have ravaged humanity.

Here's the list of some of the major pandemics that have occurred since the 20th century.

Spanish flu (1918)
Asian flu (1957)
Hong Kong flu (1968)
HIV (1980s)
SARS (2002)
Swine flu (2009)
MERS (2012)
Ebola (2014-2016)