Norovirus, also known as the winter vomiting bug, has officials at the Pyeongchang Games scrambling to stop its spread. The bug apparently began spreading when private security workers at the games came down with headaches, stomach pain and diarrhea.
A few basics about the virus:
WHAT IS IT?
Norovirus is a very infectious bug that causes symptoms including diarrhea, nausea, muscle pain and vomiting. It's more common in winter but can be seen any time of year. Symptoms usually appear one to two days after infection and typically last for another two or three days.
HOW DOES IT SPREAD?