Doctors believe that infection levels are likely to rise dramatically over the next few weeks.
Andrew Lansley, the Health Secretary, was yesterday accused of “serious misjudgment” for cancelling the under-fives programme.
Labour said Mr Lansley probably went against medical guidance in stopping the free flu jab.
The Department for Health confirmed that officials had considered again offering the vaccine to the pre-schoolers.
Instead, they reviewed the effectiveness of the jab on sickness rates among young children.
Flu rates already are approaching epidemic status with 18 adults and nine children known to have died.
One in 10 of the 460 patients with flu being treated in intensive care is under the age of 15, including 26 under-fives.
Levels have been rising at a faster rate than before the last flu epidemic in 1999, tripling in the space of the week.
Experts fear the peak of the infection is some way off.'