Thanks, Australia: Stomach Bug Spreading in US Cases from new strain of norovirus on the rise, says CDC By John Johnson, Newser Staff Posted Jan 24, 2013 7:22 PM CST 7 comments Comments The nausea lasts up to three days. (Shutterstock) (Newser) – A new strain of a highly contagious stomach virus from Australia is making lives miserable across the US, says the CDC. This particular strain is now responsible for most (58%) of the norovirus cases being reported in the country, reports WebMD and USA Today. The bug brings the usual happy symptoms associated with nausea, and it's easy to catch, even by just touching an infected object. The flu is a separate beast—"there's no connection between them at all," says a CDC epidemiologist—but its early start this year is helping deliver a nasty one-two punch in January.