New children's flu vaccine piloted in Bristol
Children in Bristol are among the first in the country to be given a new flu vaccine with a nasal spray instead of via a needle.
About 200 are involved in the research at Bristol Children's Hospital to see if the vaccine will stop flu spreading.
The "intra-nasal" vaccine was licensed in the UK last year and contains weakened strains of the flu.
It is expected to be available on the NHS to those aged from two to 17 by 2014.
Associate director of public health in Bristol, Barbara Coleman, said the pilot scheme would "help to inform" researchers if it was the best way to vaccinate young people long-term.