The<unk>  is a bacterial<unk> , currently under development, to prevent and protect against tooth decay.
Streptococcus mutans has been identified as the major etiological agent of human dental<unk> .
Several types of<unk> s are being developed at research centers.
Development of a<unk>  has been under investigation for more than 30 years: already in 1972 a<unk>  was said to be in animal testing in England, and that it would have begun human testing soon. In fact such<unk> s have not managed to come out of the laboratories so far, maybe also because of absence of economic convenience for the pharmaceutical companies.
The corporation Planet Biotechnology has developed an antibody against S. mutans which it produces using transgenic tobacco plants. This product may be considered a therapeutic<unk> , and is in clinical trials as of May 2006.
Caries vaccine
Influenza vaccine
Influenza vaccine 
HIV vaccine
Malaria vaccine
Cancer vaccine
Traveller vaccination influenza
Hepatitis B vaccine