You should stay isolated until at least 48 hours (two full days) after your diarrhoea and vomiting symptoms have completely stopped. This is crucial to prevent the spread of the infection, which is often highly contagious viral gastroenteritis (like norovirus).
Diarrhoea and vomiting can spread easily
Stay off school or work until you've not been sick or had diarrhoea for at least 2 days. If you have a high temperature or do not feel well enough to do your normal activities, try to stay at home and avoid contact with other people until you feel better.
How long is the stomach flu contagious? You're most contagious during the acute phase of the infection (when you have symptoms) and for a few days after. However, you may still be a little contagious for up to two weeks after recovering.
For common stomach bugs like norovirus (gastroenteritis), you should stay home and avoid spreading it for 48 hours (2 full days) after your last symptom (vomiting/diarrhea), especially if you work with food, kids, or the elderly, to ensure you're not contagious; for general symptoms, some guidelines suggest 24 hours symptom-free, but 48 hours is the safer, recommended period for infectious cases like norovirus.
The virus can stay in the stool for two weeks or more after recovery. Children should stay home from school or child care for at least two days after the last time they vomit or have diarrhea. Rotavirus. Rotavirus as a cause of viral gastroenteritis is more common in infants and young children.
General Advice: Service users must remain isolated with contact precautions until 48 hours after the last episode of Diarrhoea and /or vomiting. Cases should also avoid using swimming pools for two weeks after the first normal stool. Chain of infection: Page 6 6 Definition of a single case (incident):
Infection is spread through contaminated food or drinking-water, or from person-to-person as a result of poor hygiene. Interventions to prevent diarrhoea, including safe drinking-water, use of improved sanitation and hand washing with soap, can reduce disease risk.
Six common signs of norovirus are vomiting, watery diarrhea, nausea, stomach pain/cramps, headache, and fever/chills, often appearing suddenly and lasting 1-3 days, though symptoms like muscle aches and tiredness are also frequent.
To avoid gastro when a family member is sick, practice strict hand hygiene (soap/water for 20+ secs), disinfect contaminated surfaces and items (gloves/mask helpful), avoid sharing utensils/towels, keep the sick person isolated, and stay home for 48 hours after symptoms end to prevent spread. Focus on thorough cleaning of toilets, door handles, and toys, and wash clothes/bedding in hot water.
People are infectious for as long as the germs are present in their faeces (poo). Exclude until there has not been any diarrhoea or vomiting for at least 24 hours. If the diarrhoea or vomiting are confirmed to be due to norovirus, exclude for at least 48 hours.
You are contagious for as long as diarrhea continues. Infections are usually spread from hand to mouth; hand washing, care with diapering, and staying out of work or school are a few ways to prevent infecting family and other contacts.
Stomach flu and stomach bug are informal terms for viral gastroenteritis, a sickness in which a viral infection causes inflammation in the stomach and intestines.
The uptick in norovirus started slightly earlier than usual and appears to be driven by a newer variant of the virus, which fueled a harsh 2024-2025 season. Last winter, norovirus outbreaks surged to decade-high levels.
A typical illness lasts 12 to 60 hours – half a day to 2½ days. After people begin to feel healthy again, they're still contagious for a while. Many are only contagious for 48 hours; others are contagious for much longer. “People can shed the virus for many weeks after the illness has resolved,” Dr.
These symptoms can happen with all forms of gastroenteritis (both viral and bacterial). High fever and bloody diarrhea are more common with bacterial gastroenteritis. The symptoms of bacterial gastroenteritis may look like other medical conditions or problems. Always talk with your healthcare provider for a diagnosis.
Most people will recover with rest and drinking a lot of fluid. If you have gastro: rest at home and do not go to work. Children should not attend childcare or school until 48 hours after they no longer have symptoms (diarrhoea and vomiting).
Helen Chu, an infectious disease specialist at UW Medicine. If your partner gets the infection, that snuggling sesh is definitely a no-go — mostly because they will probably be spending most of their time in the bathroom.
Food poisoning and gastro (gastroenteritis) both cause stomach upset, but the key differences are the cause (food poisoning from infected food/drink; gastro often viral/person-to-person) and timing, with food poisoning often hitting faster (hours) after exposure, while viral gastro usually starts 1-2 days later, though bacteria can cause both, making timing tricky, but food poisoning symptoms are often quicker and may be more intense but shorter.
The Worst Foods for Your Gastrointestinal System
Norovirus is the biggest cause of illness from contaminated food in the U.S. The virus typically spreads when someone who has the virus touches food before serving it to someone else. Sometimes, certain foods, including oysters and other seafood, are naturally contaminated with norovirus.
To kill norovirus, use bleach-based cleaners for surfaces and thoroughly wash hands with soap and hot water, as alcohol-based sanitizers are less effective; steam cleaning can also work on fabrics, and proper food handling (cooking shellfish, washing produce) prevents spread. Disinfect contaminated surfaces by first cleaning with detergent and hot water, then applying a diluted bleach solution (5-25 tablespoons per gallon of water) and letting it sit for 5 minutes before wiping.
Norovirus is a specific, highly contagious "stomach bug," the leading cause of viral gastroenteritis (inflammation of stomach/intestines) with vomiting and diarrhea, often called "stomach flu" but unrelated to influenza; other stomach bugs can be bacterial or parasitic, but norovirus is known for rapid spread in crowds, with symptoms (12-48 hrs post-exposure) often severe but brief (1-3 days), emphasizing hydration and hygiene.
The most common symptom, and usually the first to appear, is watery diarrhea. A mild infection will cause diarrhea at least three times a day, often with some abdominal cramping. As C. diff infection becomes more severe, diarrhea increases. It may occur as much as 10 to 15 times a day.
Can I stop diarrhea without taking anti-diarrhea medicine? You can often get rid of acute diarrhea through lifestyle changes you can make at home. Drink plenty of water and other electrolyte-balanced fluids. These include diluted and pulp-free fruit juices, broths, sports drinks (Gatorade®) and caffeine-free sodas.