Given a passage and a query based on the passage, generate an unambiguous, concise and simple answer to the query from information in the passage. Note that the answer may not be present in exact form.
Q: The contagious period the time during which a sick person can give the illness to others is slightly different for each virus. 1 Norovirus. With norovirus the most common cause of viral gastroenteritis in adults and children you're contagious from the moment you begin to feel ill. 2 Rotavirus. Flu symptoms include: 1 Fever. 2 Chills. 3 Runny nose. 4 Headache. 5 Muscle aches. 6 Warm, flushed skin and watery eyes. 7 Weakness or fatigue. 8 Sore throat. The viruses that cause the stomach flu (gastroenteritis) are very contagious. The viruses that cause the stomach flu (gastroenteritis) are very contagious. Skip to main navigation Symptoms of rotavirus the leading cause of viral gastroenteritis in infants and young children usually appear one to three days after exposure. But you're contagious even before you develop symptoms, and up to two weeks after you've recovered. How long am I contagious if I have the stomach flu? Answers from James M. Steckelberg, M.D. You can be contagious from a few days up to two weeks or more, depending on which virus is causing your stomach flu (gastroenteritis). A number of viruses can cause gastroenteritis, including noroviruses and rotaviruses. The contagious period the time during which a sick person can give the illness to others is slightly different for each virus.The viruses that cause gastroenteritis are spread through close contact with infected people, such as by sharing food or eating utensils, and ... Trending in Health. 1 1 Newborn left in gym bag outside Atlanta medical facility. 2 2 Texas hospital forced to evacuate patients due to lack of water. 3 3 Ovarian cancer symptoms and warning signs. 4 4 Indiana man in a coma with confirmed case of West Nile virus. 5 5 Mom delivers baby inside amniotic sac en route to hospital. Q: When is someone who has the flu contagious? Some people who are infected with the influenza virus can actually transmit the illness before they begin to feel any symptoms. Most of the time, you will become contagious about 24 to 72 hours after contracting the influenza virus and remain that way for up to five days after the onset of symptoms. But children or people with compromised immune systems can be contagious to those around them for up to two weeks. Flu symptoms include: Fever; Chills; Runny nose; Headache; Muscle aches; Warm, flushed skin and watery eyes; Weakness or fatigue; Sore throat; The symptoms of the common cold can be similar to those of the flu, so it's important to get a firm diagnosis from your doctor. According to the CDC, more than 20,000 Americans die from the flu each year, so make sure you get your flu shot especially if you are pregnant or living with a compromised immune system. Symptoms usually appear within one to two days of exposure. Although you typically feel better after a day or two, you're contagious for up to three days after you've recovered. Some people may be contagious for up to two weeks after recovery. Check out these best-sellers and special offers on books and newsletters from Mayo Clinic. 1 The Last Diet You'll Ever Need. 2 4 Simple Steps to a Joy-Filled Life. 3 Pain Management Strategies from Mayo Clinic. 4 Stop Osteoporosis in its Tracks. 5 Protect and Preserve Your Vision. Query: how long is the flu or cold contagious
A:
The flu or cold is contagious up to two weeks.