We might use stem cells, or nano-technology, or clever sources of radiation that only affect the cancer and not the rest of your body. There are lots of possibilities and lots of different people doing research on it – it’s a really important area 🙂
I work in the area of discovering anti-cancer drugs but I can assure you we have only scratched the surface. We have already gone from a situatuon 50 years ago when cancer was effectively a death sentence to the majority of cancer sufferers surviving – largely because we now treat cancer by chemotherapy rather than letting surgeons chop lumps out of people – missing many little bits of cancer and weakening the patient.
There is an enormous range of drugs already out there – look up:
Absolutely!! I’m sure there are still undiscovered drugs in the plant species of our forrests. The problem is that we are chopping them down at such a rate we risk never finding some of them. Medics are also discovering more and more risk factors to cancer (these tell us how our lifestyle and diet affect our risk of developing cancer). So better knowledge and better drugs I am sure will improve the outcome for all.