Monday, June 15, 1998 Published at 14:08 GMT 15:08 UK
Medicinal fruit and veg could save lives
Healthy eating could take on a new meaning with vaccine vegetables
Not only are vegetables good for you, but they may soon be able to protect against life-threatening diseases.
Scientists in Cambridge believe they may be able to grow vegetables which can vaccinate against serious diseases within four years.
The first vaccine vegetable to go on trial is expected to be a potato that protects against Norwalk virus. The stomach virus caused several US warships to be put out of action during the Gulf War due to outbreaks among the crew.
Other vaccines which could be grown in genetically modified fruit and veg could include hepatitis B. Patient trials have already been carried out on a potato E. Coli vaccine. E.Coli was at the centre of the1996 food poisoning outbreak in Scotland.
Fresh fruit is unlikely to be used because it rots too quickly. But scientists are investigating the possibility of marketing the medicinal fruit and veg in dried tomatoes, mashed potatoes and banana chips.
Cambridge-based Axis Genetics, one of the companies involved in vaccine research, has announced that it has reached an agreement to work on the project with the Boyce Thompson Institute in New York.
It could make a fortune if it is successful.
Dr Iain Cubbitt, Axis' chief executive, said: "We haven't done the sums, but you don't need a very big area to grow these plants.
Researchers have found that mice fed potatoes containing the hepatitis protein produce antibodies to the disease.
They believe edible vaccines could also prove effective because they allow the vaccine to be absorbed into the saliva and not just the bloodstream as injections do.
Environmentalists have expressed concerns about the long-term effects of genetically modified food. They think tampering with nature could introduce new viruses into the human food chain which could cause chaos.