I read once that suing doctors may have a negative effect on their performance, not a positive one, because it makes them very cautious and reluctant to take measures without lengthy consideration and conversations with the hospitals' management division.

The positive of medicine outweighs its negative overall. Yes doctors don't pay complete attention to patients as they should and make mistakes, but it's better than no attention at all.

I heard about the virus technique against cancerous cells. It's a little scary to me, because viruses could evolve and become infectious and fatal. Nanotechnology seems safer. But what do I know as a lay man I just read and watch what others say, and have my humble opinion.