Dp's kids came to stay this weekend. They looked peaky when they arrived and by Saturday night one was vomiting and on Sunday the second started vomiting. Turns out their mum had it on Weds/Thurs. We didn't realise they had a bug when they arrived so didn't take any extra precautions and I've got a really close friend's funeral on Thursday (where a lot of vulnerable people are likely to be) so I'm trying to weigh up the probability of us all coming down with it. I know these bugs are super contagious but because my kids are adults, I've forgotten how quickly they spread so if anyone could let me know when we're likely to know if we have it or have escaped it that would be great!