New norovirus strain causing most norovirus outbreaks in United States
January 25, 2013
A new strain of norovirus called GII.4 Sydney was the leading cause of norovirus outbreaks in the United States from September to December 2012, according to a study published in Morbidity and Mortality Weekly Report released today by the Centers for Disease Control and Prevention. The new strain was detected in Australia in March 2012, and caused outbreaks in that country and several other countries.
Original Source: https://tools.cdc.gov/api/embed/downloader/download.asp?m=132608&c=308455