In the past week, schools from Plymouth to Fife have been forced to close after soaring numbers of children have fallen victim to the highly contagious norovirus.
Earlier this week, at Wimbledon Chase Primary School in south west London, 140 of the 639 pupils were off sick with the bug. Staff said the number was unprecedented.
As cases of the norovirus soar across the UK, fresh guidance is issued by clinicians on how to treat the symptoms.
The number of confirmed cases of the winter vomiting bug, norovirus, is 72% higher than at this time last year, health experts have said.