Viruses · Digestive
Norovirus
Acute gastroenteritis
The short answer
Norovirus can cause abrupt vomiting and diarrhoea. The nickname “stomach flu” is misleading: this is not influenza. Preventing dehydration is a central care priority.
Transmission and timing
Transmission involves contaminated food, water, hands and surfaces. Symptoms usually begin 12–48 hours after exposure; recovery does not mean shedding immediately stops.
CDC ↗Symptoms and risk groups
Vomiting, watery diarrhoea, nausea and abdominal pain are common. Most recover in 1–3 days; young children and older adults are more vulnerable to dehydration.
CDC ↗When to seek help
Markedly reduced urination, inability to drink, unusual drowsiness or dizziness on standing may indicate dehydration; do not delay assessment.
CDC ↗For life-threatening symptoms, severe breathing difficulty or altered consciousness, call your local emergency number (112 in Türkiye).
What does the test show?
Tests may detect viral genetic material or antigen. Interpret the result alongside specimen timing and illness progression rather than reading the pathogen name alone.
CDC ↗Care and treatment approach
Oral fluid replacement matters; severe dehydration may require hospital treatment. Antibiotics do not treat norovirus.
CDC ↗Prevention and everyday life
Wash with soap and water: hand sanitizer is not a substitute. CDC advises waiting at least 48 hours after symptoms stop before preparing food or caring for others; local workplace rules also apply.
CDC ↗Clinical assessment note
Use a surface-compatible disinfectant effective against norovirus according to its label. Address vomit or stool contamination promptly; gloves do not replace handwashing.
CDC ↗Bring a question to your appointment
How should we monitor hydration, and which care or return-to-work rules apply?
International evidence, local decisions
Each source’s country is identified. Vaccine access, reimbursement, isolation and reporting rules vary. Use current guidance and your clinician’s advice in your country; English does not imply UK or US eligibility.
Sources and supporting evidence
- CDC · About norovirus ↗
Country context: United States · Source checked: · Source date: 2024-04-24
- CDC · Norovirus — CDC Yellow Book 2026 ↗
Country context: United States · Source checked: · Source date: 2025-04-23
- CDC · Laboratory testing for norovirus ↗
Country context: United States · Source checked: · Source date: 2024-04-24
- CDC · How to prevent norovirus ↗
Country context: United States · Source checked: · Source date: 2025-01-13
Related topics
Version and change history
- Written by
- Doktorclub editorial team
- Medically reviewed
- Dr. Murat Toktamışoğlu
- Reviewed on
- 14 October 2026
- Next review
- 14 April 2027
- Version
- 1.0.0
- — Medical and language review completed for this language version.
- — First sourced draft prepared; medical review pending.
Doktorclub editorial content · Prepared with AI assistance and reviewed for medical accuracy and language. Information supports, but does not replace, clinical assessment. This guide does not diagnose or create a personal medication plan. Report a content correction · Editorial standards