Find info on norovirus symptoms, causes, prevention, current outbreaks, and reporting systems.

Norovirus is very contagious; it spreads very easily and quickly. You can get norovirus from sick people and through contaminated food, water, or surfaces. You are most contagious when you have symptoms of norovirus illness or during the few days after you feel better.

Norovirus is a very contagious virus that causes vomiting and diarrhea. It is sometimes called the "stomach flu" or the "stomach bug." However, norovirus illness is not related to the flu.

2024年5月8日 · Norovirus is the leading cause of vomiting and diarrhea from acute gastroenteritis among people of all ages in the United States. Each year, there are about 2,500 reported norovirus outbreaks in the United States. Norovirus causes 58% of foodborne illnesses acquired in the United States.

2025年1月2日 · Most norovirus outbreaks happen when infected people spread the virus to others through direct contact. Norovirus outbreaks have been reported in many settings. Some of the most commonly reported outbreak settings are listed below.

2025年1月13日 · Norovirus is very contagious, but you can take steps to stop it from spreading. Wash hands well with soap and water; hand sanitizer alone does not work well against norovirus. Do not prepare, handle food, or care for others when you are sick.

Norovirus infections can occur year round, but in temperate climates, activity peaks during the winter. Noroviruses are common in low-, middle-, and high-income countries. Globally, norovirus causes ≈18% of acute gastroenteritis cases and could be …

2024年9月20日 · Data on suspected and confirmed norovirus outbreaks reported to CDC by participating state health departments are updated monthly. NoroSTAT data is used to assess current and past norovirus activity and impact of future norovirus genotypes. NoroSTAT combines a subset of NORS and CaliciNet data.

2024年5月1日 · CDC helps investigate and control norovirus outbreaks by: Providing epidemiologic consultation and tools. Testing specimens and genotyping those samples that test positive for norovirus.

2025年1月17日 · Explore and download CDC's free communications resources and videos about norovirus and how to prevent it. Use the graphics and flyer on your social media channels or websites. Order window clings or decals to display on glass surfaces.