The NHS flu vaccine programme starts in the autumn. This year, two-and-three-year-olds are being offered a nasal spray instead of an injection to prevent them from getting the flu.
In some areas, it will be offered to older children as part of a pilot programme.
A nasal spray instead of an injection is a scheme that has been running in the US for 10 years.
The injectable flu vaccine will continue to be offered to pregnant women, those aged 65 and over, or adults and babies aged six months to two years with long-term medical problems.