'Only a third of NHS staff have had their flu jabs in some hospitals, posing a risk to patients.
Health bosses are aiming to vaccinate all workers this flu season and those who refuse face being taken off frontline duties.
But unions say some are too busy to get the jab, while others simply don't like needles.
The Camden and Islington Foundation Trust in north London said only 33 per cent of staff had so far been vaccinated.
t the Royal Surrey County Hospital in Guildford, just 31 per cent had been given the jab.
Meanwhile, just 28.7 per cent were vaccinated at the Hertfordshire Partnership Foundation Trust.
The uptake was slightly higher at the East Suffolk and North Essex Foundation Trust at 36 per cent, rising to 42 per cent at the Cornwall Partnership Foundation Trust.
The latest figures from Public Health England show that 46.3 per cent of staff across the country had been vaccinated as of October 31.
This was only 0.3 per cent higher than last year despite a sustained push from NHS bosses to improve uptake.
The flu season usually begins this month and healthcare staff who aren't vaccinated are at risk of infecting their patients, even before symptoms kick in.
They also put themselves out of action at an extremely busy time for the NHS and the virus typically lasts between one and two weeks.'
Read more: Only a third of NHS staff have had flu jabs, as health bosses threaten to take workers off frontline duties if they carry on putting patients at risk
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