Modern medicine, yes. Future medicine, unpredictable. Mutations happen every day, in fact, your cells go through replication, transcription, and translations millions or billions of times a day. During those times, there is a high chance that mutations does occur, and sometimes it can be a version of cancer, however, it also depends how fast it can find its errors and fix it. Usually, as person ages, metabolism gets weaker and healing becomes slower, hence if a person lives long enough, they may develop cancer at some point. However, medicine is always evolving. Recently, scientists discovered that Tardigrades are the hardest microorganism that is really difficult to kill. They have been put through a freezer that can kill almost all other organisms, they had been through space with high radiation, it turns out none of those could kill Tardigrades. A lot of it has to do with their protein called Dsup. Learning from tardigrades, we may at some point reach immortality.
