'Potato vaccine' for hepatitis B

BBC NEWS Health: "An edible vaccine against the deadly liver disease hepatitis B may have been developed by scientists in the US. Chunks of genetically modified potato may be enough to give immunity without the need for an injection, they hope. Researchers in Buffalo, New York, found signs of immunity in 60% of the 42 people who tested the potato vaccine. An oral vaccine would be an affordable way to tackle a disease which kills 1m people a year, the Proceedings of the National Academy of Sciences reported."