Hi Bandit,
Well, I am thinking in terms of healing, not in terms of enhancing.
Polio is caused by a virus and vaccine technology is not the same as genetic engineering. Diseases that are due to defective genes, such as cystic fibrosis or sickle cell anemia, or diseases that have a large genetic component, (which I believe could include Alzheimers and MD and MS, but I'm not fully read up on those conditions) may be treatable by gene therapy. Q was talking about altering DNA in the egg or early stages after fertilization, but gene therapy does not necessarily involve this approach. For example, progress has been made in treating the breathing problems associated with cystic fibrosis using recombinant rhino viruses (the viruses that cause colds). So, genetic engineering is involved but it does not mean altering the germ line (egg and sperm) cells of the patient.
However, as Q pointed out, the technology for altering human DNA in the egg/embryo is ever advancing. For a long time it was thought that it would be impossible to clone animals, yet now it is becoming increasingly more common. However, I do
not agree with human cloning nor with enhancing of human genomes (vanity, superhuman, etc), and even with respect to healing I think it is unethical (for multiple reasons, but primarily because it involves research on human zygotes, which is unacceptable to me).
I hope I'm not confusing you. Simply put, there are some types of genetic engineering that do not involve altering/sacrificing human zygotes and on a case by case basis I may support that type of endeavor. The term genetic engineering is a catch-all phrase that includes many many many types of research on all different species (bateria, plants, animals). If someone wants to villanize a new biotechnology all they need to do is label it GE and there will be a whole lot of backlash against it, even if it has nothing to do with human or animals at all. ATF mentioned the production of insulin, which can be done by genetically engineered bacteria. I mentioned your cereal. If you eat corn then chances are you have eaten genetically engineered corn.
There are lots of ethical questions related to each of these types of research and I am far far from giving my blanket assent to any one of them. Some ethics are related to the environment, some to business practices that end up hurting developing countries, and some to appropriate allocation of resources. And some of my reservations are based upon the sanctity of life and respect for God's creation.
But, we are called to heal and to feed people. If GE offers a way to do this within ethical guidelines, I am not going to rule it completely out.
Hey, thanks for the chance to say all this.
peace,
lunamoth