My DD8 got a stomach bug with a temperature of about 40c, the vomiting was quite heavy but only lasted for about 12 hours. The following day she still had a temperature but stil drinking water okay. The day after, no temperature, but kept her only on water but started her on some toast and a couple of rich tea biscuits with no problems. So on day four, we could have sent her to school but kept her home to rest, we started feeding her a bit more but kept it bland. Then during tea she suddenly vomited a lot and had bout of diarrhoea but has been fine up until now, the following morning. I'm puzzled at what what caused this relapse, considering she had passed the 48h rule, and not sure what the next step should be, to just build up the eating again?