What are Adam Ringham's predictions on the future of transgenic edible plant vaccines?

Based on the available content, it seems that I have concerns about the future of transgenic edible plant vaccines. I've mentioned that major funding is going into this research, with examples like a $500,000 grant awarded to the University of California, Riverside to study the production of mRNA vaccines in edible plants like lettuce. However, I've expressed concerns about the potential risks, such as the possibility of pollen from these plants contaminating neighboring farms. I've also suggested that there should be tighter rules on this kind of research.

However, I don't seem to have made specific predictions about the future of this technology. Would you like to know more about the current state of research or the potential implications of these vaccines?