How would I counter an argument about the failures of genetic engineering in humans?

Question by Somebody: How would I counter an argument about the failures of genetic engineering in humans?

I am doing a health debate for my health class, and I was assigned Pro genetic engineering in humans. I have all my information and refutes down, but I still do not know how I am going to counter when the other team brings up the failures of genetic engineering.
For example:
Other Team: You say that with genetic enginering, the whole world could be cured of disease. Considering that out of 238 human subjects, 34 had serious side effects afterwards, and only 4 subjects were deemed successful. If we were to branch off and focus more on genetic engineering, our population would significantly decrease with unsucessful tests like these.

What would I say to counter that?

Best answer:

Answer by Eric
Genetic engineering is still in early stages of study.
We are not even close to finished with research in this field, and given some time, we will have improved these tests.
We normally only run these tests on terminally ill patients, and these kinds of tests give subjects a chance at a better life, even if there is a chance of adverse side effects.

What do you think? Answer below!