I ask because I'm worried we might have passed one onto our friends ds. Dh and dd1 were both sick once on Sunday afternoon and the friends visited weds lunchtime. So they were past the forty eight hours by a good margin but I'm worried the bugs might have hung around the house. Was very diligent with cleaning-have ds and a baby too and none of us got it. But want to make sure I know so we don't infect anyone in the future.