DS2 and I have had a stomach bug ( Ds2 at weekend, me yesterday) and DH has just gone to bed feeling sick. DS1 has just started his GCSEs this week. We have been doing the hygiene routine - disinfecting toilets, door handles, taps etc but I am desperately worried DS1 will pick it up nonetheless, as DH has, despite all the hand washing etc. Would you send DS1 to stay with friends for the next few days, or is it too late? Problem is that all his friends are doing exams too and I don't want to risk them getting it.