Flipping the experiment around, neurons modified to produce more of the protein than usual had a stroke survival rate 31% higher than their unmodified counterparts.
Like, the scientists need to expose vaccinated humans to the unmodified parasite to make sure it won’t cause an infection, because they didn’t test that this time.
If in the greenhouse, we can see that the genetically modified plant is yielding more than the unmodified one, then we have the acid test saying, does this actually provide a higher yield on our experimental farm?