Thank you for your question. It could be read as a very broad and open
question, but I think you are referring to some research that has been
publicized recently. The research involved an experiment with plants
similar to what is done to vaccinate human beings. A specific part of a
protein associated with tobacco mosaic virus was expressed in a plant
and the plant reacted by stimulating its defenses that fight against the
virus. The plant thus became immune to the tobacco mosaic virus without
being directly infected by the virus.
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