A nasty new strain of stomach bug sweeping the globe is taking over in the U.S. and has caused more than 140 gut-wrenching outbreaks since September, health officials said.

The new strain of norovirus has sickened people in Japan, Western Europe, and other parts of the world. It was first identified last year in Australia and dubbed the Sydney strain.

It may not be unusually dangerous – some scientists don't think it is – but it is different, and many people might not be able to fight off its gut-wrenching effects...

Read more at NBC