epidemic是什么意思？

PepsiCo is to spend billions of dollars to develop drinks and snacks and reformulate existing ones with lower sugar, salt and fat, as consumers demand healthier options and regulatory pressure intensifies amid an obesity epidemic.

The spread of epidemics to their homeland.

To call stress an epidemic isn't exaggeration.

Currently, there’s mounting criticism of Michelle Obama’s Let’s Move campaign, which fights childhood obesity by encouraging youngsters to become more physically active, and it signed on singer Beyonce and basketball player Shaquille O’Neal, both of whom also endorse sodas which are a major contributor to the obesity epidemic.

If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic.

With no known vaccination or cure available, it seems only a matter of time until another epidemic erupts

Another Ebola epidemic may erupt sooner or later.

Harris says that American education is suffering from an epidemic of "fake math"—an emphasis on the rote memorization of formulas and steps, rather than an understanding of how math can influence the ways we see the world.

To call stress an epidemic isn't exaggeration.