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'It is heartbreaking how the swine flu jab changed my son'

20 September 2013 Last updated at 20:44 BST

Four families have been told they can apply for government compensation over side-effects of the Pandemrix swine flu vaccine.

Studies have shown the jab increased the risk of the sleep disorder narcolepsy.

Families could be entitled to £120,000 if they can prove "severe" disability. Jon Kay reports.

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