Q&A: H7N9 bird flu

A new type of flu has made the jump from birds to people in China - it is known as H7N9.

The World Health Organization says it as an "unusually dangerous virus", but it is still too soon to say whether it will pose a global threat to human health.

How bad is it?

What are the symptoms?

Should I worry?

What should I keep an eye out for?

The new H7N9 influenza virus

Has this happened before?

How does H7N9 bird flu differ from H5N1?

What is a pandemic?

How close to a pandemic are we?

Where has the virus spread?

Is it safe to visit China?

Could there be cases elsewhere?

Do the drugs work?

Is there a vaccine?

What do those H's and N's mean?