Muslim parents are reportedly refusing to allow their children to have a nasal flu vaccine because the treatment is not halal.
Concerns were first raised over the spray - Fluenz Tetra - containing pork gelatine last year, but the issue has been highlighted again ahead of a new nationwide drive.
At the time, the Vegetarian Society branded the use of the ingredient in three vaccines as 'disappointing', while the Muslim Council of Britain said the spray would only be permitted if there was no alternative and lives were at risk.
Next month, every healthy child between two and 10 in England will be offered Fluenz Tetra to increase herd immunity.
But uptake in areas with a high proportion of practicing Muslims is 'significantly lower' than the average, reports the Telegraph.
Dr Shuja Shafi, the chairman of the Muslim Council of Britain's research and documentation committee, said: 'We have consulted the scholars and this is their view… we need another vaccine which is halal.'
Last year Dr Shafi urged doctors to find a 'long-term solution' to the issue. Two other vaccines, MMR VaxPro and Zostavax, also contain gelatine. [Daily Mail] Read more