Not to mention, if your tummy flu is anything like the one we have passed around here? the next person may not show symptoms for another week. About a month and a half ago, my daughter got sick first a week later me, all the same symptoms so I know it was the same virus. Strange at how long it seems to float around inside before showing itself. I try to stick with 48 hours, thats enough time for the sick to feel better and you would think IF anyone was to come down with it it would be within that time frame....not so much this year, seems to be a longer incubation period! yuck! can't wait for spring!!!!