China Faces Worst Chikungunya Outbreak in 20 Years

There's a big problem in China right now: many people are getting sick from a virus called chikungunya.

It's spread by mosquitoes, just like other viruses.

This outbreak is the worst China has seen in a long time, mostly happening in a city called Foshan.

The virus causes high fever and really achy joints, which can last for weeks.

Experts think the warm, wet weather and not enough people having immunity are causing this.

The World Health Organization is worried because this is happening all over the world, and a lot of people could get sick.