I wouldn't use the word "problem" but to explain it better, cancer rate itself has not dropped necessarily but due to early detection, number of deaths from can

I wouldn't use the word "problem" but to explain it better, cancer rate itself has not dropped necessarily but due to early detection, number of deaths from cancer has dropped. We still have a long way to go to actual be able to cure cancers especially in advanced stages. Still a good win but more work to do.