Final answer:
One of the risks of biopharming vaccines is the potential spread of the gene used in genetically engineered plants. This can have unintended consequences in the environment.
Step-by-step explanation:
One of the risks of biopharming vaccines is that the gene used in the genetically engineered plants could spread to natural populations. This can potentially lead to unintended consequences in the environment if the gene is transferred to other organisms. It is important to carefully consider the potential risks and benefits of biopharming vaccines to ensure the safety of both human health and the environment.