How long are you contagious after vomiting?

http://uimc.discoveryhospital.com/main.php?id=3094 "Vomiting itself is not contagious and poses no risk to others. However, if the cause is an infection, the infection may be contagious." - University of Illinois Medical Center, Link above quote http://www.etown.edu/HealthServices.aspx?topic=SCNauseaAndVomiting "While nausea and vomiting themselves are not contagious, the things that cause them may be very contagious. " - Elizabethtown College Service, Link above quote The most common reason for vomiting is viral gasroenteritis. That can be contagious for more than 2 weeks after symptoms end. Without diarrhea though it sounds like VG isn't the likely cause. From what I've read it looks like vomiting by itself is likely a more mild virus and isn't contagious after 24-48 hours. This isn't verified though. http://digestive.niddk.nih.gov/ddiseases/pubs/viralgastroenteritis/ "Viral gastroenteritis is highly contagious. The viruses are commonly transmitted by people with unwashed hands. People can get the viruses through close contact with infected individuals by sharing their food, drink, or eating utensils, or by eating food or drinking beverages that are contaminated with the virus. Noroviruses in particular, are typically spread to other people by contact with stool or vomit of infected people and through contaminated water or food-especially oysters from contaminated waters. People who no longer have symptoms may still be contagious, since the virus can be found in their stool for up to 2 weeks after they recover from their illness. Also, people can become infected without having symptoms and they can still spread the infection. Outbreaks of viral gastroenteritis can occur in households, child care settings, schools, nursing homes, cruise ships, camps, dormitories, restaurants, and other places where people gather in groups. If you suspect that you were exposed to a virus in one of these settings or by foods prepared on the premise of places such as a restaurant, deli, or bakery, you may want to contact your local health department, which tracks outbreaks." - National Digestive Diseases Clearinghouse, Link above quote