Flu infection rates 'have doubled'
Rates of flu infection have more than doubled in the last week, figures show.
Cases of flu have risen to 87.1 per 100,000 people, from 32.8 in the previous week, according to the Royal College of GPs.
The data covers England and Wales and shows that school-age children are particularly affected.
Rates of flu are highest in youngsters aged five to 14, followed by those under four, then people aged 15 to 44.
Among all ages, rates almost tripled in the South in one week, from 36 per 100,000 to 93.4.
In the North, the rate was 55.5, up from 15.7, and was 94.9 in the central England region, up from 37.9.
Cases of common cold and bronchitis have also risen across the country.
Swine flu is still the most dominant strain of flu this winter, but there are other types, including type B
On Tuesday, the Department of Health announced that 302 people are currently in intensive care with flu.
It is unclear how many have swine flu but they are expected to be in the majority.