no he should not still be having the runs!!! get the doc in or phone nhs direct. In the mean time stop food and stick to clear fluids, electrolyte solution from the chemist, not plain water...has anyone else in the family caught it?..is he dehydrated? (pinch skin gently on back of hand, it should spring back flat, if it stays in a peak, make sure that you mention this when talking to the doc/nurse) also probably a sensible precaution to kepp him away from small kids, elderly people and anyone else for whom d and v can be life threatening