Do edible vaccines exist, and if yes, what is their mode of action? Are there any edible vaccines commercially available now?
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In short, yes.
A good example of an orally-administered vaccine is this Polio vaccine.
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$\begingroup$ Other than polio..?? Have anyone heard about that vaccine that are incorporated into food items like potato or banana? $\endgroup$– Ashwin.NSep 19, 2015 at 14:03
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$\begingroup$ Rabies, typhoid and many others are available as oral formulations. @Ashwin.N You are asking about a GM Food with vaccine properties? $\endgroup$– WYSIWYGSep 19, 2015 at 14:21
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$\begingroup$ Yes sir!! You are right!! I was asking about that only!! Can you tell me more about GM food with vaccine properties with real life examples!! Plz $\endgroup$– Ashwin.NSep 19, 2015 at 15:34
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1$\begingroup$ Ah. My mistake. Yes, those exist. I am not aware of any large-scale deployments, but there have certainly been trials. Examples: Hepatitis B vaccine trial in transgenic potatoes: pnas.org/content/102/9/3378.short E. coli vaccine, also in potatoes (mouse trial): sciencedirect.com/science/article/pii/S0264410X98800200 $\endgroup$– bshaneSep 19, 2015 at 16:05
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$\begingroup$ @Ashwin.N In that case can you edit your question to add this information? $\endgroup$– WYSIWYGSep 21, 2015 at 4:44