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

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4月24日 · 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 …

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.

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.

Norovirus is a commonly reported cause of diarrhea among travelers in confined spaces (e.g., on cruise ships, and in camps, dormitories, hotels). Risk for infection is present anywhere food is prepared in an unsanitary manner and can be contaminated, or where drinking water is inadequately treated.

2024年4月24日 · Diagnostic methods for norovirus testing focus on detecting viral RNA (genetic material) or viral antigen. RT-qPCR assays are the preferred diagnostic method to detect norovirus. EIA tests should not replace RT-qPCR during outbreak investigations; they are not recommended for testing single samples from sporadic cases.

If norovirus infection is suspected, adherence to PPE use according to Contact and Standard Precautions is recommended for individuals entering the patient care area (i.e., gowns and gloves upon entry).

2011年3月4日 · Since 2001, when CDC published the most recent norovirus recommendations , substantial advances have been made in norovirus epidemiology, immunology, diagnostic methods, and infection control. This report reviews these advances and provides guidelines for outbreak management and disease prevention.