Pandemic (noun)

An outbreak of a disease that occurs over a wide geographic area and affects an exceptionally high proportion of the population.

Origin:

From greek pan- "all" + demos "people".

Examples:

1. The COVID-19 pandemic has affected millions of people worldwide.
2. The Spanish flu pandemic of 1918 killed tens of millions of people.
3. The pandemic has caused widespread economic disruption.
4. The pandemic has put a strain on healthcare systems.
5. It's important to follow guidelines from health officials during a pandemic.