Researchers
have genetically modified zebrafish so they produce hepatitis
B vaccine. They hope that one day people will be able to eat
fish to get vaccinated rather than having to be injected.
Edible vaccines may be less expensive than other forms, and
researchers say it could be added to commonly eaten fish like
salmon.
However, researchers are uncertain how many fish would need
to be eaten to get the proper dose of vaccine, and further
studies need to be conducted to determine whether the vaccine
would be damaged by the digestive process.
BBC
News September 15, 2003
