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Public Health England (PHE) has published mid-season data on the effectiveness of this year’s flu vaccines, alongside data from other countries, in Eurosurveillance. The data suggest that the nasal spray flu vaccine is 87% effective in children aged 2 to 17 years against the main circulating strain, influenza A(H1N1)pmd09.

The vaccine given to adults aged 18 to 64 in at-risk groups is estimated to be 39% effective against the same strain. Influenza A(H1N1)pdm09 has been the main strain circulating this season. As the number of cases is lower, a precise estimate for those aged 65 and over will not be available until the end of the season.

More children have been vaccinated than ever so far this season, with over five million children being offered the nasal spray. The vaccine has been offered to an additional school group (year 5), meaning that all children aged 2 to 9 years old are now eligible. As younger children have poorer hand and respiratory hygiene than adults, they tend to spread flu more easily, so protecting them is really important for protecting the rest of the population.

Vaccine uptake in children aged 2 and 3 is 43% and 45.2% respectively, and among school-aged children, this ranges from 56.2% to 63.9% depending on year group. Whilst these are the highest levels ever, there is still more that can be done to increase uptake.

Dr Mary Ramsay, Head of Immunisation at Public Health England, said:

It is encouraging to see that this year’s vaccines are offering a high level of protection against the main circulating strain of flu – particularly for children. Children tend to be ‘super-spreaders’ of flu, and so protecting them is crucial for protecting the rest of the population.

We’re pleased that more parents have been taking up the offer of vaccination for their children – and encourage anyone who is eligible to do so every winter. It’s the best defence we have against this unpredictable virus. Read more

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