Last winter swine flu claimed 90% of UK flu deaths
25 May 2011 Last updated at 09:35 BST
New figures show that last winter's flu outbreak claimed more than 600 lives across the UK.
Unusually most of them were under 65 and had contracted swine flu.
Experts have expressed concern over the low number of people who received vaccinations, particularly those in vulnerable groups.
Dominic Hughes reports.