A quarter of nasal spray vaccines ordered for children before the flu season is delayed, Public Health England (PHE) has announced. AstraZeneca said around a quarter of its batches since arriving in November were delayed due to the need to repeat some common tests.
Some schools will need to reschedule vaccination sessions planned for mid-November, PHE said.
It does not say how many schools or children are likely to be affected.
Children at risk, such as those with asthma, should visit their GP if their school session is delayed, PHE advises.
Laurent Abuaf, country president at AstraZeneca UK, said: "We realize how important it is to deliver a full vaccine supply to the NHS and do everything possible to reduce the delay of these affected batches.  READ MORE: Flu jab: How effective is the flu vaccine? When you should be vaccinated
"As part of our normal product release process, we need to repeat some reviews before a portion of our vaccine supply is released and delivered.
"It is the most important of all batches to complete the test process before they are issued, and we are working as quickly as possible to achieve it.
" We are committed to working in partnership with Public Health England and the Department of Health and Social Care (DHSC) in support of the first possible delivery of all nasal spray vaccines required for the NHS's childhood flu vaccination program. "
Dr Mary Ramsay, head of immunization at Public Health England, said:" We work with AstraZeneca and NHS England and Improve. to ensure that all eligible children get their flu vaccine as soon as possible.
Most flu vaccines have already been given to GPs and schools, the PHE said.
The flu vaccine is the best form of flu prevention.
But if you or your child has the flu there are a number of ways to prevent the spread of the disease.
How do you know if you have the flu?
The following symptoms are related to the disease:
- A sudden fever – a temperature of 38C or higher
- An aching body
- Feeling tired or tired
- A dry cough
- A sore throat
- A headache
- Suffering from sleep
- Loss of appetite
- Diarrhea or tummy ache
- Feeling sick and sick feeling
Children may also become sick to their ears and appear to be less active.
How to treat the flu
The flu can be treated at home with rest and sleep, keeping warm, taking paracetamol or ibuprofen at lower temperatures and treating aches and pains, and drinking plenty of water to prevent dehydration.
A pharmacist may also have five treatment tips.
If you have sudden chest pain, difficulty breathing or start coughing up blood, call 999 or go to A&E.