Japan scientists working on a nasal spray bird flu vaccine
Updated
Researchers in Japan say they are close to developing a painless bird flu vaccine that can be sprayed into the nose instead of being injected.
Presenter: Girish Sawlani
Speaker: Dr Hideki Hasegawa from Japan's National Institute of Infectious Diseases, Greg Tannock from the Macfarlane Institute of Medical research and public health in Melbourne
