Viruses are the threat to our health. But I think that even their action might be turned into good for a human being. I am talking about obese people.
They have to constrain themselves in food, exhaust themselves in work outs… I will not list all the difficulties they have to face. And what if new species of viruses could be grown, which was implanted under the skin, and destroy fatty tissue? Not completely of course. When it came to the stage needed, some counteracting pills could be taken, and viruses were destroyed.