A cyst is a sac-like pocket of tissue that contains fluid, air, or other substances. Cysts can grow almost anywhere in your body or on your skin. There are many different types of cysts. Most cysts are benign, or non-cancerous.
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 â the time during which a sick person can give the illness to others â is slightly different for each virus. 1  Norovirus.2  With norovirus â the most common cause of viral gastroenteritis in adults and children â you're contagious from the moment you begin to feel ill. number of viruses can cause gastroenteritis, including noroviruses and rotaviruses. The contagious period â the time during which a sick person can give the illness to others â is slightly different for each virus.
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