Flu cases are skyrocketing, causing huge problems for hospitals, NHS England bosses are warning.
Last week the number of patients in hospital in England with the virus topped 5,400 a day on average – around 1,000 higher than a week before.
NHS England's Prof Julian Redhead said cases were going up at a "concerning rate" with hospitals "bursting with patients".
He said this was causing delays in A&E and for ambulances as staff struggled to cope with the demands being placed on them.
It comes as around 20 NHS trusts have been forced to declare critical incidents because of the pressures they are facing.
