there are two virus going around uk at mo called rota and nora virus -both are contagous ! usually clears in couple of days , if not see your gp . keep hydrated with sugar salt soloutions or flat coca cola does the trick !
The stomach flu. It is very easily spread and can spread very quickly. It is not really considered the flu but the technical name I can never remember, gastro something. As awful as vomitting and diarrhea is, it ussually passes within a day or two hang in their and keep everyone hydrated.