The interesting thing about cancer screening is that it has almost no effect on mortality rates, but massively increases rates of diagnosis. The increased rates of diagnosis result in a perceived increase in 5 year survival rate. But that is just a statistical mirage due to the increased diagnosis of "cancers" that are likely benign. The treatment of those benign cancers also results in significant iatrogenic harm. There are basically 3 types of cancers, very fast growing ones that you can do nothing about (you're fucked), moderate growing ones that can be treated, and will kill you if you don't treat them, and very slow growing ones that will give you no trouble before you are well and truly dead from other causes or just old age. Screening can't help you on the first type, you're dead anyway. It doesn't pick up too many of the second type, maybe a few, but they would likely have been picked up once they become symptomatic. It picks up lots of the third type, resulting in much unnecessary treatment (and its associated harm). The treatment is also very lucrative for the pharma companies, and the increased diagnoses allow the cancer "charities" to push for more and more money too. It's not only war that's a racket.