Some cancers have high cure rates eg testicular cancer. Other cancers eg ovarian and prostate, we need to work further on. Despite what you read in the Daily Mail (my Dad rings me up and tells me that I’m out of a job), discoveries are small and we add to them little by little. I’m interested in why cancers developed, the steps beforehand as well as the treatment when you have been diagnosed.
That’s a tricky question because as Jaine has said below, some cancers are already curable. As regards to “finding a cure” we already understand a huge amount about what causes, cancer how cancer cells work and how they respond to treatment. Scientists then compile this information and experiment with the cancer cells- which takes a long time and costs money. I think we have made huge progress and have found treatments that are hugely successful, for example childhood leukaemia. It is can be treated very successfully in over 90% of cases.