Rates of norovirus in that CDC system have reached levels at or above last season's peak in all regions of the country. Norovirus test positivity rates look to be the worst in the Midwest, in a grouping of states spanning Kansas through Michigan.

If you're ill with the "stomach flu," you're not alone. Norovirus is surging across Arizona, is highly contagious and spreads rapidly.

New CDC data indicates a rise in cases of norovirus, often colloquially referred to as "stomach flu." Test positivity has spiked.

Hand sanitizer alone isn't enough to protect you from norovirus, experts say. So it's important to know how to stay safe and wash your hands properly.

Norovirus cases are significantly increasing in the US and Canada. Moderna is developing an mRNA-based vaccine, currently in Phase 3 clinical trials, with the potential to be the first approved Norovirus vaccine by 2026.

Moderna is testing a norovirus vaccine in a phase three trial. Results could be available as soon as this year.

In addition to the respiratory illnesses making their mark, a particularly nasty strain of norovirus, better known as the stomach bug, has been circulating throughout South Jersey and the surrounding areas.

Illinois had at least 103 outbreaks of the stomach bug norovirus in November and December — a dramatic increase from previous years, according to the Illinois Department of Public Health. During the same time last winter,

Doctors in the United States are warning everyone to look for dehydration as an important symptom of norovirus infection, which has seen a significant rise across the country this winter season. According to experts,

Pomerene's Katie Wright suspects people are treating flu-like symptoms at home. "From a clinical perspective, we're not seeing an uptick in numbers."

You can also get norovirus by touching objects or surfaces that are contaminated and then putting your hands in your mouth without washing them first. Hand-washing with soap and water is key, as hand sanitizer will not do the trick in the case of norovirus, experts say.

No. Hand sanitizer is simply not as effective against norovirus as it at killing other pathogens due to the virus's firm shell, Dr. William Schaffner, professor of infectious diseases at Vanderbilt University Medical Center, told TODAY.com recently.